EEPH Case study database web by d39H97

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									Organisation         Project name               Link to further
                                                information / website

A.C. Whyte & Co. Ltd. External Refurbishment
                      of 25 Properties, Islay   s/argyll-community-housing-
                      (for Argyll Community     association/
                      Housing Association)

Affinity Sutton      FutureFit        
alsecco   Chapel House and Dean

alsecco   Springwell Estate,
Balsall Heath Housing Inspiration                www.inspirationbirmingha
Co-operative          Birmingham2020   

Calderdale Council   Retrofit Insulation pilot
Camden Council,       St Augustines Road, Low
Sustainable Energy    Energy Victorian House perhomes/st-augustines-
Academy, UCL,                                 road-camden-london/
Kingspan Insulation

Celotex, Eurocell     Nottingham City Homes
Changeworks           Archibald Place

Energy Saving Trust   EnergySave Luton (Luton
                      Borough Council)
Gentoo              PAYS trial  

Hanson Structherm   Birmingham Concrete
                    Block project
Hanson Structherm   Lyndhurst Towers
                    (Birmingham City

Hanson Structherm   Cumberland Avenue
Hanson Structherm   Spencerbeck House

Hanson Structherm   Daneville Estate,
Hanson Structherm   Franklands Drive Area

Hanson Structherm   South Green Drive,
Hanson Structherm   One Homes Project,
                    Edith Avenue

Hanson Structherm   Pentwyn Court, Aberdare

Kdb insulation &    Regent Park Road
Green factory
Kingspan Insulation   Morecambe Stone House

Knauf Insulation      Lower energy terrace
                      Manchester             e/lowerenergyterracedhous
LHC               Woodward Road Estate -
                  Wall Insulation Project Studies/WPH-N6-Case-

Manchester City   E.ON Challenge 100
Manchester City   Bowes St CESP scheme

Metropolitan      Neighbourhood
                  Investment Unit
Notting Hill Housing   Sterndale Road

Places for People      Solar House 80/50

Places for People      Whitechapel TwentyFifty
Princedale Ecohaus   20 Lena Gardens
Ltd                  100 Princedale Road

Riverside            North Bransholme
SIG Energy   Anne Rhodes Community
Management   Centre

SIG Energy   SFHA Carbon Portal
Management   Project
Simmonds Mills   Grove Cottage

Spectus Window   Moss Side regeneration

SPS Envirowall   Holdroyd House (Bristol
                 City Council)
SPS Envirowall   Newport private
                 residents scheme

Sto              Midmoor Road
Stoke-on-Trent City   Stoke-on-Trent CESP
Council               scheme

Sustainable Energy Bertram St (WHISCERS)
Academy, United                             perhomes/london-camden-
House, Parity                               bertram-street/
Projects and Camden
Swish Building   Strait Road, Beckton

VPhase plc       Great Places Housing
                 Group Voltage
                 Optimisation Trial

WALLTITE         Green House Project, St
Westminster City   Energy Efficiency in
Council            Flatted Buildings

Wetherby           Grays Road, Barnsley
Wetherby   Highfield Road,

Wetherby   Oakwood Estate,
Wolverhampton City All Saints and Blakenhall
Council            Community

Green Energy Centre Pagets Builders

Green Energy Centre Whitehall Financial
Egnida (whole house Modern 1980s end
retrofit             terrace 2 storey   /101/desc/housing-
microgeneration and house in Newport    association-40-turnstiles-
heat recovery                           newport-/
solution for Charter
Housing Association)

Greater London      RE:NEW    

Argyll Community Housing Association (ACHA) awarded A.C. Whyte & Co. Ltd. the £600,000 contract to
carry out external refurbishment works to 25 properties on the Isle of Islay that were feared to be in a bad
state of disrepair.

The properties were constructed with a traditional brick cavity wall and the project was originally billed for
the replacement of the cavity insulation with traditional render overcoat system applied to a stainless steel
lath. However, prior to works commencing the Client approved a change in specification as A.C. Whyte &
Co. were able to demonstrate that better value for money could be achieved by installing an insulated
render system that would alleviate future defects whilst providing a reduced thermal conductivity and
ultimately a reduction in carbon emissions. In addition, the alternative system would eliminate the
necessity to remove the existing cavity fill as the dew point would move to the external leaf of the property,
thus eliminating condensation issues.

Works began in June 2011 and were completed over 2 months ahead of schedule in September 2011;
following completion, properties in Oban were added as an extension to the contract.

FutureFit drills down into the practicalities of delivering low carbon retrofit to social housing stock, looking
at cost, supply chains, lack of skills, resident apathy, access to finance, and differing property types. The
programme aimed to identify the true costs of retrofit and determine what could be achieved under three
budgets: low (£6,500), medium (£10,000) and high (£25,000).

102 homes from 22 common archetypes were retrofitted with packages were tailored to achieve the
greatest possible improvement in SAP rating. As well as the works, lifestyle advice is being offered to half of
these plus an additional group of 50 residents who have had no works done. This is so that at the end of the
monitoring period the impact different approaches combining works and lifestyle can be understood.
alsecco’s Ecomin 300 external wall insulation (EWI) system has been specified by Aedas Architects in
Liverpool in conjunction with Kier for the refurbishment of high-rise social housing in the Sefton area of

One Vision Housing provides social housing across Sefton, Merseyside and Chapel House and Dean House
form part of phase one of the refurbishment of their high rise accommodation blocks.
alsecco provided workshops for Kier and Aedas Architects, which resulted in the specification of the Ecomin
300 system for this project. A combination of render and large tiles were used, enabling design features to
be incorporated in to the facade finish.

With approximately 3000m2 being installed in each block, the Ecomin 300 thick coat render system
incorporates higher levels of reinforcement offering a greater degree of impact resistance, vital for this type
of development.

The Ecomin range incorporates a core of mineral wool insulation offering fire resistant properties as well as
thermal performance. This cost effective system guarantees a high level of quality and functional reliability
as well as being energy saving and providing long term protection for the building. A wide range of finishes
can be applied to the systems offering endless design options to the architect.

alsecco won the tender to work with The Gateshead Housing Company on the refurbishment of properties
on the Springwell Estate in Gateshead. This was the first time that alsecco had worked on a social housing
project, highlighting how versatile and cost effective its external wall insulation solutions are.

The Gateshead Housing Company is a non profit-making organisation managing around 21,000 homes in
the area and was experiencing problems with damp in more than 80 homes on the Springwell Estate. The
homes were a tar slag construction with poor quality mortar which was causing cold bridging and allowing
moisture to penetrate the walls.

The Basic Phenolic 1 system used is a high performance, fully acrylic or mineral/silicone based thin coat
render system. It is ideal for refurbishment projects providing an easy to apply solution to effectively
insulate the building. The use of phenolic rigid board as the insulating material ensures a thinner insulation
board with improved thermal properties.
The aim of the Inspiration Birmingham 2020 project was to demonstrate a whole house holistic approach to
deliver an 80% cut in CO2 emissions for a typical Victorian terraced property found in many parts of
Birmingham. The project was developed and managed by low carbon consulting engineers Encraft Ltd,
working in partnership with Balsall Heath Housing Co-operative.

The project sought to addresses three specific barriers to large scale low carbon housing retrofit:

i) The technical “hard-to-treat” challenge
ii) The skills challenge
iii) The capital and maintenance cost challenge

We addressed these challenges by focusing on technologies which are largely established so there is
maximum potential for economies of scale in replication and scale up and minimum maintenance costs.

This was a pilot project to investigate the distribution and numbers of properties unsuitable for standard
fibre insulation measures. It identified practical measures to insulate a range of house types and sets out
recommendations for programmes to insulate the thousands of stone properties and those with attic
rooms in the borough.

The project achieved its initial aims of insulating 40 Hard to Treat properties lived in by vulnerable
households using different insulation methods.
This dilapidated 1850’s semi-detached solid-walled house needed conversion from two separate flats back
into a single home for local authority tenants. The building was in a very poor state of repair and needed
total renovation of the building fabric in order to make it habitable. Special attention was given to
airtightness and detailing to avoid moisture problems and increase efficiency.

The aim was to reduce the carbon emissions of the property by approximately 80% using conventional
materials and trades while retaining as much of the heritage of the building as possible.

Measures included:

• Walls: 102.5 mm of Kingspan Kooltherm K18 Insulated plasterboard on most walls
• Pitched Roof: Two layers of 75 mm Kingspan Kooltherm K7 Pitched Roof Board with breathable
• Floor: The basement concrete slab was insulated with Kingspan Kooltherm K3 Floorboard Insulation with
a screed above.

Other measures included:
• A new Worcester Greenstar condensing gas boiler
• 4.5 m2 solar hot water panels
• Photovoltaic roof arrays
• Double glazing

Nottingham City Homes’ Secure Warm Modern programme is one of the largest social housing
refurbishment contracts in the UK, involving the improvement of over 29,000 properties to Decent Homes

The initial specification from Nottingham City Homes required ‘E’ rated windows. However, once Eurocell
fabricator Nationwide Windows had been awarded the contract the two companies, along with Pilkington
Glass, worked together to make a number of improvements which ultimately enabled the development of
an ‘A’ rated window that could be supplied within the tendered rate.

Walls were internally lined using Celotex PL4000 a high performance thermal laminate offering premium
performance with the minimum impact ton special loss.

Thermographic imaging was used in a trial project in the Aspley area of Nottingham, demonstrating a SAP
rating improvement of 30% and a CO2 value which improved by almost 44% as a result of the thermal
upgrade. Air leakage results also confirmed a tighter building envelope with the air leakage rate improving
from 16.42 to 4.68m³/(h.m²)@50Pa.
These nine listed Georgian properties in Edinburgh had large windows with very poor U values. The
refurbishment aimed to achieve a minimum U value for Part L 2010 of the Building Regulations for Scotland
without losing the character of the properties. Refurbishment of this kind had previously been prohibited
by the Edinburgh City Council.

Changeworks’ objective was to save tenants energy and money off their fuel bills, demonstrating that
appropriate double glazing can be acceptable in built heritage while conserving their appearance.

Nine types of slim double glazing were installed into nine category ‘B’ listed tenement flats. U values
improved significantly from around 5.5 to as low as 1.0.

Three ‘hard to treat’ social housing properties were identified for refurbishment works through EnergySave
Luton - a Victorian mid-terrace property and two 1960’s no-fines properties.

The three properties were typical of the stock in the locality, ensuring that the approaches taken would be
replicable for Luton Borough Council (LBC) and would provide useful learnings for wider industry.

The project aimed to improve the awareness of best practice sustainable refurbishment to the
management teams at LBC, their maintenance and M&E contractors and direct labour teams, and all those
engaged in the delivery of the carbon reduction programme. The targets set were to achieve or exceed
Building Regulations Approved Document part L1B 2010.

Measures carried out included insulating the solid walls and roof, the insulation of the ground floor, the
reduction of air penetrations, and improved controls to the heating and ventilation systems. PV panels
were also installed.
The Home Energy PAYS pilot scheme, managed by the Energy Saving Trust (EST), gave Gentoo customers in
73 properties the opportunity to benefit from the installation of energy efficient measures and
microgeneration technologies in their homes, with no upfront costs required.

Customers were offered a range of “eco upgrades” that included double glazing, external wall insulation,
solar PV systems, ‘A’ rated combi-boilers and thermostatic radiator valves. Rather than paying for the
installations upfront, weekly repayments are spread over a long period so that they are always lower than
predicted energy bill savings.

Gentoo’s PAYS scheme was broken down into three phases. The average cost per property varied
depending on which phase it was part of, ranging between £3,500 and £10,000. The lower cost per
property excluded the cost of solar PV systems, which remained the property of Gentoo. The higher cost
per property was down to the installation of external wall insulation and the additional works required for
this to take place, i.e. roof line renewal. The average weekly repayment also varied depending on the phase
of the scheme, ranging from £2.70 to £4 per week.

The ‘Birmingham Concrete Block project’ is a large scale refurbishment of non-traditional and traditional
houses in Birmingham over a five year programme.

Birmingham City Council have 68,000 properties, 12,000 of which are of non-traditional construction
encompassing 40 different building types, 240 properties of which are high rise. Birmingham has a
framework agreement in place to carry out this large scale refurbishment and Hanson Structherm is
providing external refurbishment solutions.
These five high rise blocks of flats on the Lyndhurst Estate were constructed using in situ concrete for the
frame and a no-fines concrete infill which was then clad with brick. The flats were in a bad state of repair,
looking dilapidated and urgently requiring external refurbishment due to problems with damp,
condensation, water ingress and poor thermal performance.

Birmingham City Council (BCC) wanted an external refurbishment solution to the problems associated with
poor thermal performance and one that would reduce CO2 emissions and improve the external appearance
of the block.

Hanson Structherm’s “High Build” External Wall Insulation (EWI) and Fastbrick insulated real brick slip
cladding systems were specified. The EWI system consisted of a layer of 90mm thick, high performance
Mineral Fibre insulation boards, two layers of 3mm basecoat render with glass fibre reinforcing mesh
embedded were then applied.

To complete the system, the client chose a high performance through coloured silicone render finish, to
provide a modern and fresh look to the buildings. On the ground floors, Fastbrick, an insulated real brick
slip cladding system, was chosen because of its robustness and impact resistant properties.

City West Housing Trust (CWHT) was formed in 2008 to manage the social housing stock in Salford, Greater
Manchester. The trust had a 5 year programme to upgrade over 300 non traditional properties comprising
of various building types such as Unity, No Fines Concrete and Reema.

Phase 1 of the programme was for the refurbishment of 46 Unity properties on the Cumberland Avenue
Estate built during the 1950’s. These properties were in various states of disrepair, many with serious
structural defects such as longitudinal cracking of the prefabricated reinforced concrete (PRC) columns and
cracking and spalling of PRC lintels. They had a poor thermal performance of just 1.62W/m2K and were
looking dilapidated and in a bad state of repair.

Hanson Structherm’s unique Structural External Wall Insulation system was chosen for the external
refurbishment of the properties. The system is based on the performance of a unique, two-way spanning,
lightweight galvanised steel wire space frame with a rigid insulation core - the Structural Insulated Panel.
These panels were joined together with mesh to provide a rigid, continuous envelope around the
properties with real structural integrity and excellent thermal performance.

A 12mm layer of basecoat render was then applied to the system which worked with the panels to provide
a high degree of spanning and racking strength. To complete the system a high performing render finish
was applied.
Spencerbeck House had undergone no external refurbishment works since it was built three decades ago.
Coast & Country Housing (CCH) decided to invest £2.5 million in the first major refurbishment programme
for the block to bring the flats up to modern standards.

A full structural survey was carried out to determine the condition of the building. It was found to have a
structurally sound concrete frame but failing no-fines concrete infill panels. The building also had extremely
poor thermal performance resulting in high fuel bills for residents, pushing some into fuel poverty.

Hanson Structherm’s unique Structural External Wall Insulation and Fastbrick systems were chosen for the
external refurbishment of the building. The Structural External Wall Insulation system is based on the
performance of a unique, lightweight galvanised steel wire space frame with an insulated core. The vertical
panel spanning method was used to provide a rigid, continuous envelope around the upper floors of the

To complete the system a 12mm layer of basecoat and then a high performing contemporary acrylic finish
was applied in a golden yellow colour. This finished layer provided the properties with an attractive façade
that fully met the client’s aesthetic expectations.

On the ground floor Fastbrick, an insulated real brick slip cladding system, was used because of its
robustness and impact resistant properties.

The Daneville Estate in Liverpool comprises of approximately 600 two-storey Boswell type properties
managed by Liverpool Mutual Homes (LMH). The properties were un-mortgageable and unsustainable in
various stages of disrepair, many with serious structural defects such as detachment of gable walls and
random cracking. 63 properties were also listed as void with a cumulative void period of 1000 years.

The properties were refurbished using a combination of Hanson Structherm’s Structural External Wall
Insulation and standard External Wall Insulation systems. These systems were chosen ahead of others as
they offered several unique qualities that would help meet the project objectives in relation to thermal
performance, structural integrity, and aesthetic qualities.

Thermal performance has improved greatly with the U value dropping from 1.55 W/m2K to approximately
0.29 W/m2K.

The improvements have reduced carbon emissions, from a typical 8 tonnes to 2.11 tonnes per annum (per
property) - a total CO2 reduction across the estate of 3,534 tonnes per annum.
Community Gateway Association (CGA) was formed in 2005 to manage 6000 homes in ten local community
areas of Preston and the surrounding areas. CGA invested £80 million in the first five years on a home and
neighbourhood improvement programme in order to bring every home up to the Decent Homes Standard
and now invest £15 million each year to ensure that residents can live in modern, comfortable homes.

CGA recently commenced the upgrade of 70 BISF non-traditional built properties on Franklands Drive and
other nearby streets. The properties were severely defective, poorly insulated and extremely expensive to

CGA wanted a cost effective solution for externally refurbishing the houses and one that would:
Allow residents to remain in their homes during the work without stripping the external walls
Create a watertight and thermally efficient building envelope Reduce CO2 emissions and lower residents’
fuel bills Improve the external appearance of the houses

Hanson Structherm’s unique Structural External Wall Insulation system incorporating 80mm thick Enhanced
EPS insulation was specified for the external refurbishment of the properties as it can be installed over the
Falkirk Council recently embarked on a programme to upgrade its stock of various non-traditional built
properties. It was decided that a specialist designer / supplier was required to carry out the refurbishments.
Hanson Structherm was in regular contact with the Architects and Quantity Surveyors and, due to its track
record and unique Structural External Wall Insulation system, was asked to assist in the design for the
refurbishment of 26 Weir Multicom type non-traditional properties in Airth.

Weir Multicom properties are of timber frame construction and are susceptible to rotting due to water
ingress, they are also very poorly insulated and extremely expensive to heat. Many of the properties had
condensation problems and deteriorating unattractive cladding on the façades.

The Council wanted a cost effective solution for externally refurbishing the houses and one that would:
• Allow residents to remain in their homes during the work
• Create a watertight and thermally efficient building envelope
• Reduce CO2 emissions and lower residents fuel consumption
• Improve the external appearance of the houses

Hanson Structherm’s unique Structural External Wall Insulation system incorporating 105mm thick PIR
insulation was chosen for the external refurbishment of the properties as it can be installed over the
original walls and cladding without removing any of the original building. To complete the system a two
tone dash finish was applied to significantly improve the appearance of the properties.
Manchester City Council (MCC) is going through a programme of upgrading its stock of ‘Hard-to-Treat’ Solid
Wall properties to bring them up to Decent Homes Standard.

A typical two bedroom end terrace house was chosen to undergo a complete internal and external
refurbishment and to become a live show house using all the latest eco friendly products such as solar

As part of the external refurbishment MCC wanted a cost effective solution for externally refurbishing the
rear and gable elevations of the property and one that would:
• Improve thermal performance and therefore cut fuel bills.
• Reduce CO2 emissions.
• Improve the external appearance of the property.

The client wanted to retain the architectural brick façade to the front of the property therefore the
brickwork was cleaned up and insulated internally.

Hanson Structherm’s External Wall Insulation with high performance through coloured terracotta acrylic
render finish was the chosen system as it was able to offer a solution to each of MCC’s requirements.

Rhondda Cynon Taff (RCT) Homes was formed in 2007 and is currently undertaking the largest home
improvement programme Wales has ever seen. Around £170 million is being invested in homes and
communities in Rhondda Cynon Taff over a five year period – and around £750 million over the next 30
years – to bring more than 10,000 homes up to Welsh Housing Quality Standard.

As part of the investment programme RCT is externally refurbishing many properties. This includes 10 non-
traditional Arcal type properties in Aberdare, South Wales which have a long list of defects:
• Severe corrosion of stanchion bases
• Cracking and spalling render
• Rain penetration and rot in cladding panels
• Missing or poorly fixed asbestos cement sheet cladding
• Deterioration of protective coatings

This eco retrofit of a derelict Victorian end of terrace house located in London was undertaken using the
principles of Passivhaus design and software.

The project was carried out for a private client who wanted to upgrade their home to reduce the energy
required to run and heat it and create comfortable living environment.

The focus of the project was to combine refurbishment of a listed building with improvements to the fabric
that would be equal to the best newly built eco-houses. Externally, the building would retain its period look
with traditional box sash windows and render mouldings but the interior would have an art-deco finish.

External Wall upgrade consisted of a combination of Homatherm Batts and carefully taped Airflex thermal
reflective barrier to achieve air-tight construction and a predicted u value of 0.16
This semi-detached solid stone walled eighteenth Century building was brought up to beyond Part L1B 2010
regulations for the external walls whilst being continually occupied by a family.

The aim was to reduce energy consumption through the use of internal wall insulation as the property was
in a conservation area, but not listed.

92.5 mm of Kingspan Kooltherm K18 Insulated plasterboard was installed on all internal walls.

The major success was that the occupants were in residence throughout the installation which gave the
following benefits:

• Occupiers did not have to move out of their own property with associated worries about security or the
emotional upheaval of moving and all the associated financial costs
• The occupiers were also able to make decisions about finish and aesthetics which was vital for their
acceptance of the works.

Recognising the need for affordable, low-energy housing, self-builder and academic, Andrew Gill, has
undertaken an ambitious project to prove that cost-effective refurbishment of existing housing stock is a
viable possibility. Challenging himself with the complete renovation of a dilapidated terraced house in
Manchester, he turned to Knauf Insulation to supply extensive insulation measures throughout the

Adopting a fabric first approach, Andrew’s key objectives throughout the project were: increasing
insulation, improving air tightness, managing ventilation and limiting embodied energy within the
refurbishment. Most importantly, he was adamant that improved insulation and air-tightness must work in
tandem, to ensure maximum efficiency.
The Woodward Road Estate Wall Insulation project is part of Wirral Partnership Homes' (WPH) Low Carbon
Housing Retrofit programme planned for much of its 12,500 mixed tenure properties. The plan
incorporates customer education and non-intrusive carbon reduction measures and retrofit works including
External Wall Insulation.

WPH, the largest registered social landlord on the Wirral peninsular, chose to use LHC’s OJEU compliant,
pre-tendered Building Insulation (N6) framework arrangement to help develop a low carbon retrofit
strategy, as an element of a major Decent Homes related improvement programme.

Other investment initiatives include loft insulation and the installation of energy efficient heating systems.
Passive security and kerb appeal works have also been incorporated into this project, developed in
partnership with the Estate’s residents.

Through its Challenge 100 project, E.ON worked with 100 families in 100 homes across the country with the
aim to see a positive change in fuel poverty levels within 100 days.

E.ON took a ‘community’ or ‘whole street’ approach to delivering Challenge 100, targeting anyone affected
by fuel poverty living in selected streets, regardless of their energy supplier. E.ON worked closely with local
authorities in Birmingham, Luton and Manchester to identify ‘Lower Super Output Areas’ suitable for
Challenge 100.

Assessments took place In the Abbey Hey area of Manchester and 18 fuel poor households were identified
to have measures installed.

• All 18 properties had External wall insulation installed
• 7 received loft top-up
• 7 received new boilers
• 2 central heating systems were installed
The major remodel of Bowes Street will maintain the basic grid pattern of the existing terraced street but
promotes substantial changes to the physical structure through significant demolition and the creation of
larger homes through both the conversion of existing property and new build. There is also a requirement
to invest in more sustainable existing stock and selective removal of the poorest quality houses to create
greener streets, a more attractive streetscape and a long-term sustainable mixed tenure housing

Vision for the Area

• To create a mini ‘eco-village’ involving the refurbishment of hard to treat properties and the building of
new properties
• To showcase the great potential to improve older Victorian, hard to treat properties
• To refurbish older properties that will compliment the planned new build properties on the adjacent bus
depot site – 113 new family homes
• To create large family homes through 2-into-1 conversions that will increase the choice of family sized
homes and create more a stable sustainable community
• To provide a mixture of tenures within the re-modelled area by providing refurbished homes for sale and
for rent

Metropolitan has a large property base in Haringey where, in 2004, we were faced with 600 hard-to-treat
homes with very high reactive repairs costs. In response, it was decided to set up the Neighbourhood
Investment Unit (NIU), a small regeneration team tasked with tackling these properties, carrying out a
whole-house package of works that bring them well beyond the Decent Homes standard, retrofitting them
to achieve typical carbon savings of 45%.

The programme decants the residents for a period of approximately 14 weeks, during which time the
property undergoes significant works.

The team also involves a Resident Liaison Officer (RLO) who works with the residents and wider community
throughout the process. Due to the team’s close links with Metropolitan's Community Investment Team,
residents have been helped back into work and families linked with programmes such as our Eat Well, Eat
Wise healthy eating programme and our sport outreach initiatives.
19 Sterndale Road is a six bed Victorian family home in the largely owner occupied area of Hammersmith
and Fulham.

The main aim of this exemplar project was to inform the development of design guidelines and
specifications for Notting Hill’s Property Services and Development Department. These guidelines will form
the basis of future mass refurbishment of Victorian, Edwardian and Georgian properties.

An additional aim of the project was to improve the Energy Performance Certificate of the property from a
band G to a band B.

Sterndale Road was selected as a test bed to work out which technologies and products perform best, from
both from an environmental and a commercial point of view. The project also offered the opportunity to
gather feedback from contractors on buildability and value of different improvement measures.

The project also had to meet modern day living aspirations through the specification of cost effective
measures that are easy for occupiers mid terrace house reduce running costs andwas chosen for
10 Haddington Way is a three storey to get along with, built in the mid 1990s; it carbon emissions.
refurbishment through the Retrofit for the Future programme because of its relevance - this time period
saw the peak of social housing completions by housing associations so it represents a highly typical
construction type.

The project team developed a solution to deliver a whole-house approach to the improvement of the
dwelling. The planned range of works involved improving the building fabric (insulation, air tightness and
thermal bridging), the building services (heating, hot water, ventilation, fixed lighting and domestic
appliances) and renewable energy systems (solar water heating and solar power).

The aim of this project was to deliver 80% carbon reductions in mainstream housing using established
solutions that work for the people who live in them. Places for People wanted to:

• test the mix of measures and technologies
• identify the real world carbon saving they produce
• test the supply chains for carbon reduction measures and technologies
• develop a clear cost base for achieving significant carbon savings
• create replicable solutions for mainstream housing
• deliver savings that do not rely on the commitment of householders

Too often the most important element of low carbon housing is missed – the people who live in the homes.
As part of this project surveys and interviews were carried out with the residents to get their views on their
homes and what they would want to see if they had the refurbishment. As an integral part of this project
the residents have been engaged from start to finish – whether that is gathering data on their energy use or
the simple siting of radiators.
These two Victorian properties in West London were technically designed and retro-fitted by Princedale
Ecohaus Ltd to meet Passiv Haus specification. A sympathetic refurbishment in consistency with the age of
the building and the conservation regulations in the area was required.

Princedale Ecohaus Ltd also designed and manufactured 35 new windows that were almost
indistinguishable from the original Victorian sash windows.

To meet the stringent Passiv Haus specification, the windows have to be below a 0.8 U value and airtight.
Installing triple glazing ensured this specification could be met, the windows were first of their kind to be
designed and manufactured in England.

At the North Bransholme estate in Hull, Riverside has undertaken an area based refurbishment which is
tenure blind using a mixture of CESP funding and credit union loans.

Solid wall insulation has reduced the U value of main walls from 2.1 W/(m²K) to 0.3 W/(m²K).

Boiler replacement has improved efficiency from below 70% to above 90%.

All homes now have 270mm loft insulation giving a U value of 0.16 W/(m²K).
SIG Energy Management worked in partnership with Rotherham Council to increase energy efficiency on a
‘green’ demonstrator property - an unoccupied flat above a communal building in the Dearne Eco Valley.

As well as traditional measures like insulation and glazing, it would incorporate all relevant renewable

Measures included:

• Solar PV
• Solar Thermal
• Air Source Heat Pump
• External Wall Insulation
• Voltage Optimisation
• Double Glazing
• Remote Monitoring System

Before this project, the flat received an EPC energy efficiency rating of grade E and an environmental
impact rating of grade F. Once the project was complete and all measures were installed, the flat received
an EPC energy efficiency rating grade A and an environmental impact rating also of grade A.

SIG Energy Management in partnership with IRT Surveys Ltd carried out a widespread analysis and
efficiency overhaul of over 30,000 properties managed by the housing associations within the Scottish
Federation of Housing Associations.

While the technology used and the collaboration between partners is groundbreaking, in terms of
implementing the project the process is simple:

1. Thermographic surveys are carried out on every property, giving a comprehensive overview of the
housing stock and its efficiencies.
2. SIG Energy Management and IRT Surveys then work closely with the SFHA to identify which
properties/areas are most inefficient and advise how and where measures can be installed to improve
energy efficiency and emissions.
3. SIG Energy Management then, with the agreement of the SFHA and the relevant housing association,
install the recommended measures, which could be anything from loft or cavity wall insulation through to
solar panels or ground source heat pumps.
4. Ongoing analysis evaluates the success of the efficiency measures themselves and establishes the
improvements seen by tenants.
5. The successes and outcomes of the project are published on the Carbon Portal – the website for which
the project gets its name ( This will provide a comprehensive information portal
for housing associations wishing to learn more about and contribute to tackling fuel poverty and CO2
Grove Cottage is a two bedroom, detached cottage located in Hereford. The pre-refurbishment cottage was
difficult to heat and maintain at an even temperature due to draughts and excessive heat losses, despite
high energy bills.

The refurbishment of the property used Passivhaus principles to maximise thermal performance, and
radically improve energy efficiency. Underpinning these ambitions was the desire to ensure that the
finished result was in keeping with the cottage’s original character.

To avoid reducing the sizes of the rooms, the designers opted for external wall insulation. To conserve the
exterior aesthetics of the property external render was created to display the same characteristics the walls
did pre-retrofit.

Measures also included triple glazing, MVHR, a new A-rated boiler, 100% low energy lighting, high
performance doors, floor insulation, improved roof insulation.
Over 160 properties across four streets in the Moss Side area of Manchester have been completely
refurbished with a view to them achieving an EcoHomes rating of Very Good, under a £17m Homes and
Communities Agency funded regeneration project.

Council-owned, part-owned and owner-occupied properties received insulated render systems to the rear
of the buildings, roof replacements and loft insulation, facelift work to the front in the form of repointing,
repairs and cleaning, and new front and back doors – all contributing to huge improvements in the
buildings’ thermal efficiency. Spectus Window Systems further advanced the energy efficiency of the
properties by supplying its flagship Elite 70 PVC-U window profiles, which deliver optimum thermal
efficiency and can deliver Window Energy Ratings of Band A.

GB Building Solutions employed a dedicated customer relations officer to keep residents up to date,
educated and engaged via letters, phone calls and face-to-face contact. On window replacement days, a
respite caravan was provided for residents so they had somewhere they could go to keep warm, make
drinks etc.

Resident reception to the works has been phenomenal, and house prices in the area have risen by an
average of £20,000. refurbishment of a 1960’s 17 storey apartment block consisting of 87 properties.
This project involved

Apart from the obvious height challenge, the main challenge was to ensure the finished building blended in
with the surrounding environment. Working closely with Bristol City Council, SPSenvirowall specified a
system using a combination of brick slips, brick render and coloured render. The end result was a far more
efficient and comfortable apartments for tenants, elimination of damp and mould problems, and an uplift
to the aesthetics of the area.
The project consisted of the refurbishment of 220 privately owned properties in Newport. The system
installed used a combination of dash and brick render detailing to ensure that the refurbished properties
would blend in to the surrounding architecture. The project able to attract significant funding which
ensured that the contribution required from residents was low and thus affordable.

The refurbishment of this mid-terrace Edwardian solid-wall property in Balham, South West London aimed
to achieve an 80% reduction in CO2 emissions. The front elevation of the building forms part of an
attractive streetscape within 100 yards of a conservation area, while the rear of the house is only visible
from gardens.

The property owners, Family Mosaic, stipulated that the finished property must not introduce any
complexity into the ongoing maintenance schedule, and that the building should be easy for the tenants to

On the front elevation, where the priority was to maintain the external appearance of the facade, an
internal insulation solution was used. On the rear elevation, with considerably greater external wall area to
be considered, StoTherm Classic external wall insulation system was the obvious solution.
Stoke-on-Trent City Council in partnership with North Staffordshire Warm Zone (NSWZ) identified two CESP
areas that could deliver substantial carbon reductions.

The two selected areas were Middleport (funded by ScottishPower) and Northwood (funded by British Gas)
. The purpose of the two pilot projects in these locations was to evaluate effectiveness of renewable energy
technologies to inform city council policy development in relation to renewable deployment.

The proposed package of energy efficiency measures was implemented in 676 properties in Middleport and
865 in Northwood:

• A social and private External Wall Insulation scheme.
• The large potential for new heating and heating replacement programme in private sector.
• Other measures to go in area include: heating controls, draught proofing, fuel switching, loft top up, and
energy advice.
• Looking to develop a small pilot project consisting of 10 properties to install solar PV and air source.
• Look to develop a small pilot project consisting of 10 properties to install solar thermal panels.

In 2009, a partnership of the Sustainable Energy Academy, United House, Parity Projects and Camden
Council secured funding from the TSB ‘Retrofit for the Future’ competition to develop its WHISCERS (Whole
House In-Situ Carbon Energy Reduction Solution) process. It's aim was a 77% CO2 reduction to achieve a
target of 17Kg CO2/m2/year.

The key to this retrofit was to cocoon the house with internal wall insulation and high performance sash
windows. The revolutionary WHISCERS process for retrofitting internal wall insulation in older properties
was used to reduce disruption and enable the residents to remain at home throughout.

1. A laser scanner measures the internal dimensions of a room.
2. The digital data is downloaded to a factory based off-site cutting machine, which cuts the insulation
boards to match the walls, and optimises the cut to minimise wastage.
3. The cut boards are then delivered to site as a kit, where they are fitted to the walls with the minimum of
noise, mess and disruption.
These 1970’s properties were built in the traditional brick pier style of the time with the front and rear
elevations clad in timber. The objective was to replace the degraded timber cladding and improve the
thermal performance of the buildings within a tight budget. Newham Homes wished to retain the
appearance of dark timber cladding in order to be in keeping with other properties in the area.

Cellular PVC weatherboard cladding was chosen in preference to timber because of its superior thermal
efficiency and because PVC does not require maintenance throughout its service life (which could be in
excess of 60 years).

The three-month project involved removing all existing timber cladding from 70 homes and replacing it with
Swish low maintenance PVC mahogany cladding. To achieve the required U value, insulation was also
required and a leading PIR board was specified.

Great Places Housing Group was looking to investigate the ease of installation and the savings potential of
domestic voltage optimisation technology in its typical housing stock.

The VPhase voltage optimisation device was supplied directly to Great Places Housing Group, to install in 4
terraced properties across 2 streets.

The VPhase device is suitable for both retrofit and new build scenarios, but it was specifically the ease of
retrofit that was of interest in this project, along with the savings potential. The project was managed
entirely by Great Places Housing Group and their in-house electrical installers, and resulted in minimal
disruption for tenants with installations typically taking only 1 – 2 hours. Tenants were educated about the
product with marketing literature and an interactive savings calculator to help illustrate projected savings.

Huntingdonshire District Council worked with the Building Research Establishment on the Green House
Project to demonstrate how a typical family home can be refurbished affordably and easily.

The property had inefficient cavity wall insulation and inadequate loft insulation. Both had been installed
when the building was constructed and did not meet modern standards of insulation.

The existing cavity fill in the external walls was removed and replaced with 70mm WALLITE cavity injection
insulation. In addition, the existing loft insulation was replaced with 60mm WALLTITE spray foam insulation
between the rafters combined with 150mm mineral wool. The loft area has been weatherproofed under
the tiles, with a non-breathable HR type membrane.
In June 2009 Dolphin Square Foundation and Westminster City Council appointed ECD Architects, Keegans
Cost Consultants and PPCR to carry out a study into the obstacles to improving energy efficiency in private
residential flatted buildings in Westminster.

Six buildings were identified and once the freeholders’ commitment to exploring improvement options was
secured, occupiers were sent an introductory letter explaining the project and service on offer. The six
buildings chosen contained on average only 6 flats. Small buildings were chosen in order to provide the best
chance for the proposed works to be agreed by all parties. Participating leaseholders were then offered
personalised advice about the potential energy efficiency improvements within their individual flats and the
freeholder provided with advice regarding the common building elements.

Verbal and written guidance regarding the process for consulting their respective lawyers regarding
alterations to leases, and guidance on how to obtain financial assistance towards the building works and
any associated legal costs was provided the freeholder and leaseholder for each building. The Council also
offered to subsidise the legal costs that would be incurred if changes to leases were required to allow
energy efficiency works to be completed.

Having prepared detailed assessments for each property with proposals for improvements and collated
legal, financial and technical data, ECD Architects then met with leaseholders and freeholders to discuss
options for uptake.

The homes in this terraced street had begun to look tired and in need of improvement. Barnsley
Metropolitan Borough Council, using Regional Housing Board funding from the Homes & Communities
Agency, set out to reduce heat loss through energy efficiency measures whilst improving the appearance of
the properties and help continue the overall regeneration of the housing within this area.

The application of a WBS Insulated Render System incorporating 50mm Phenolic insulation saw the U
values of the properties drop from 1.43W/m²K to 0.31W/m²K allowing the residents to enjoy significant
benefits, including a reduction in their heating/cooling bills.

A WBS 1.5mm Silicone Render finish in cream was applied to the first floor of the properties and, due to the
houses being positioned directly onto the pavement, WBS Brick Slips in Merida Red were applied to the
ground floor levels to help prevent against impact damage whilst giving a warm traditional appearance.

To continue the clean lines of the façades and ensure a tidy finish, the cabling was hidden behind specially
constructed duct covers which were then painted in a terracotta colour to help blend with the brick slips.
Reema properties are constructed from reinforced pre-cast concrete and are classified as ‘hard to treat’ in
terms of energy efficiency improvements as they are of non-traditional construction and do not have
cavities within the walls.

Drum Housing Association refurbished a number of Reema homes at Highfield Road, Petersfield and
installed a comprehensive package of energy efficiency measures to achieve an estimated 70% reduction in
carbon emissions.

A WBS Insulated Render System was chosen for the external insulation solution as this not only increases
the thermal performance of the properties but will also reduce carbon emissions and help to reduce
residents heating bills in the future.

100mm phenolic insulation was fixed to the substrate. This was then followed by a K&A basecoat and a top
coat of WBS 2mm Silicone ‘K’. The installation of the insulation system reduced the U value of the
properties to an impressively low 0.20 W/m²K.

Properties in the Oakwood Estate in Maesteg were suffering from considerable distress with damp walls,
decayed lintels, poor eave details and poor thermal performance. Years of financial neglect had left new
social landlords Valleys 2 Coast with the choice to either demolish the whole estate, which would have
broken the community, or carry out a community regeneration programme. The decision was taken to

The Wetherby team were involved from the outset, not only active in the design criteria but also ensuring
that the right specification was available within the budget constraints. Prior to the installation of external
wall insulation, works were carried out to remedy defects and as part of the overall improvement scheme
roof mounted solar technologies were included.

60mm phenolic insulation was fixed to the existing substrate followed by a base coat and reinforcing mesh.
The tenants were then given the choice of the final finishing coat from either dry dash, silicone render,
brick slip or a combination. A co-ordinating Wetherby GRP canopy added the finishing touch.

The external wall insulation system reduced the U-value of the properties from an existing 2.25W/m²K to a
highly efficient 0.28W/m²K. Tenants now live in warm dry homes and health issues associated with damp,
cold conditions have drastically reduced, giving a financial payback to the health service. Stress related
health problems have also been dramatically reduced.
Wolverhampton City Council’s cabinet member for regeneration and environment had commented that
“Fuel Poverty is a significant issue in Wolverhampton particularly as energy prices continue to rise.
Therefore, insulating so called hard to heat properties will ensure that we can make affordable warmth a
reality and reduce CO² emissions at the same time”.

The overall objective of this project was to answer some of the key questions regarding Flexible Insulation
Linings (FILs), marketed as Sempatap Thermal, in relation to both reducing health risks and delivering
energy efficiency improvements in solid wall homes.

The revolutionary insulation technique to help make homes warmer was piloted in the Wolverhampton
ABCD area. Solid wall homes with Category 1 Hazards failings for excessive cold were identified in the All
Saints, Blakenhall and Parkfield areas of the City and Burrows Contractors were trained on how to apply
Sempatap Thermal Flexible Insulation Linings by MGC.

I.R.T Surveys Ltd was commissioned to carry out independent Thermal Imaging of the properties before and
after the application of Sempatap Thermal. I.R.T stated “Analysis of the property after insulation reveals
significantly reduced heat loss across the elevations suggesting a much more energy efficient property”.

The Challenge: To reduce the energy spend on the range of buildings contained in the yard area.

The initial approach was to address behavioural issues. These worked for a while and then began to tail off.
A full energy survey was undertaken to look at all possible measures which would result in energy
efficiency. These were mainly old buildings and the constant entry and exiting of customers was a particular
challenge. A combination of both electrical and heat measures involving lighting, insulation, control systems
and energy management. We worked with existing partners to supply all of the materials to give an overall
payback of less than 4 years on the measures.

The Challenge: To assist WFI to save money through reduced energy use using relevant energy efficiency
and renewables measures.

A full energy survey was undertaken to look at all possible measures which would result in energy efficiency
or maximise incentive schemes for renewables. Being an astute financial company the financial business
case had to be robust and the competitive energy prices meant that only the best solutions would be
attractive. A combination of both electrical and heat measures involving lighting, insulation, control systems
and energy management were put in place. The green energy centre worked with existing partners to
supply all of the materials to give an overall payback of less than 4 years on the measures.
This modern 1980s end terrace house in Newport, South Wales was built with masonry cavity wall, pitched
tiled roof and single glazed wooden windows. There had been very little improvement to the property
since construction.

Lots of energy was being wasted as a result of heat loss through the building fabric and through draughty
windows and doors. Due to lack of poor natural lighting, tenants needed to put lights on during the day,
their appliances were inefficient and hot water was not heated or used efficiently.

The whole house approach to refurbishment included:

• Loft insulation, internal dry lining to external walls and hardwood triple glazed windows and doors
• Solar thermal, PV panels and a ground to water heat pump
• A+ rated white goods and low energy lighting
• Installation of a solar light pipe and a solar space extension

RE:NEW was launched in April 2009 and is a pan-London homes retrofitting scheme aimed at reducing CO2
emissions from the residential sector. The programme seeks to establish a consistent London-wide, area-
based delivery programme to bring together London’s relevant current home energy retrofit programmes
into one consistent best practice model to harmonise and up-scale efforts on domestic carbon dioxide

The delivery agents, with support from local authority officers, engage households on a street-by-street,
community basis to gain access to as many homes as is possible.

Once in the home, delivery of RE:NEW is premised on a particular ‘customer journey’ based on an initial
energy audit of the home by a qualified assessor. Residents are first advised on the behavioural elements
of reducing consumption. They then have a number of ‘easy’ energy efficiency measures installed to help
reduce energy and water consumption immediately. Finally, where appropriate, they are booked on to
receive ‘harder’ measures such as loft, cavity or solid wall insulation and micro-renewables.
Lessons Learned

Islay is the most southerly island of the Inner Hebrides, roughly 35 miles north of Northern Ireland. Due to
the remote location of the project, it was vital that it was delivered as efficiently as possible to avoid
logistical issues and delays that might impact on the programme and budgets. In order to reduce transport
and delivery charges material was bulk ordered and a haulage company was employed to transport the
material via ferry to Islay. Once in Islay, the material was stored at a builder’s merchant and batches of
material were collected and held in secure containers on site. A.C. Whyte operatives stayed in Islay for the
duration of the works.

A number of contractor and Resident Liaison Officer forums were held throughout the project and an
online Knowledge Hub was put in place to ensure consistency of objectives and approaches across the
project. The Hub contained documents and tools as well as a discussion forum.

The main lessons learned through FutureFit include:

• Initial findings suggest that there is a funding gap of approximately £3,000 per property between the net
cost of carrying out the works and the value of energy savings.
• A ‘£6.5K package’ achieved an 18% reduction in carbon emissions.
• Resident engagement is vital and requires sustained and intensive awareness campaigns. FutureFit’s
offer of free works resulted in only a 4.8% initial response rate and 23% dropout from sign-up stage to
completion of works.

To deliver wide-scale retrofit in the future, the ideal approach for Affinity Sutton would be to mainstream
The Ecomin 300 system allowed for a façade finish combining large tiles and render to realise the
architects design, in conjunction with a high degree of impact resistance required for the project.

The Basic Phenolic 1 system was supplied to the project as it met the client’s needs, offering high insulation
and anti-vandal properties as well as remaining within budget constraints.
What would we definitely do again :
• It would not have been possible to carry out the required building works with the tenants remaining in
the property
• Tenant ‘buy in’ – every effort was made to involve the tenants in the over the whole project cycle. This
was key to the success of the project.
• Appoint a reputable main building contractor with the knowledge (or the willingness to learn) of energy
• Keep the number of specialist sub-contractors to a minimum - managing the project was made easier by
minimising the number of sub-contractors
• Carryout air-tightness testing at key points during the refurbishment - this proved extremely useful in
identifying and correcting weaknesses in the air tightness of the property.

What would we definitely not do again :
Finding suitable private rented accommodation was very time consuming and delayed the project by
several months.

Households need improved access to impartial information about how their properties can best be
insulated. Many people don't realise that there are other alternatives to fibre insulation products.

Vulnerable households need assistance with procurement from trusted contractors.

Around 20% of the homes surveyed had a narrow cavity suitable for expanded polystyrene (EPS) bead or
polyurethane foam. They had all been previously surveyed and householders informed that their properties
were unsuitable for fibre insulation, but were not made aware of any alternative solutions.

Properties built after 1900 are more likely to have a fillable cavity, but others may be picked up from

Significantly, around 25% of properties needed essential repairs before insulation could be installed.

Internal dry lining products are available for walls, but they are disruptive and costly to install.

External cladding is unlikely to be suitable as a common remedy locally because of the stone heritage.

Attics can be dry lined easily and successfully with composite phenolic foam boards.

Insulation should be considered when carrying out remedial or renovation works, preferably using subsidies
as incentives.

Lower income households were found to be very price sensitive. Take up of insulation increased when full
grants were offered.
The property is in a conservation area so it was necessary to ensure roof lines and heights weren’t breached
and that the external look of the property wasn’t altered.

Ensuring that all subsequent trades didn’t ‘undo’ the work of previous trades was a challenge (breaching an
air-tight membrane for example).

On-site best practice was observed with ‘toolbox talks’ to ensure that all staff were aware of the timing and
management of measures – especially detailing

Controls for heating and plumbing need to be made simple for those trades and, more importantly, for the
occupants of the building.

Some aspects of a refurbishment like this may be difficult to achieve unless the building owner is carrying
out a full refurbishment.

Eurocell was in a position to be able to offer Nationwide windows a solution for dealing with the 100,000+
end-of-life frames generated through the refurbishment. This involved Nationwide separating frames from
glass before returning them to Eurocell’s dedicated recycling plant in Derbyshire. This material is then
reground to make PVC-U Thermal Inserts, which are subsequently used in Eurologik profiles during
fabrication by Nationwide Windows to achieve an ‘A’ rating. In what is a completely closed loop process,
the windows are fitted back into the same NCH properties from which the end-of-life frames were

This case study demonstrated that upgrading using high performance Celotex insulation can be effectively
achieved whilst the occupier is still in residence and that the high performance of the product creates little
or no effective impact on spatial loss within the property.
Project successes

• U Value improved significantly, thus saving the tenants of the houses energy and money off their fuel bills
• Partnership working led to approval and support by conservation and planning bodies
• Council subsequently changed policy to permit double glazing in listed buildings across city
• Significant uptake in planning applications for double glazing in listed buildings since policy change

Challenges faced

• Ensure blended design with surroundings
• Preserve the timber sash windows of listed properties
• Planning restrictions (listed buildings, conservation area, UNESCO World Heritage Site)
• Residents at high risk of fuel poverty

Lessons learned

• Buildings retained their original look and provided an excellent example of how to refurbish properties in
a way that is compliant with conservation regulations and can change planning perceptions

A significant factor highlighted was the requirement for skilled workmanship on site to deliver the level of
energy efficiency improvements.

Toolbox talks were given to contractors by the Energy Saving Trust at key points in the programme of
works. The focus was on the importance of achieving sufficient levels of air-tightness, timed to coincide
with the installation of internal and external wall insulation. The contractors were receptive to the toolbox
talks and this was deemed something that will be carried on in to future projects for Luton BC.

The project team was fortunate to have cooperative tenants who agreed to stay in the properties during
the works. However, one property had more disruption than planned and the residents had to be moved
out which entailed further cost for Luton BC.
Uptake of energy efficient measures amongst customers was very high. In Phase 1, 96% of customers chose
to participate in the scheme, while 100% participated in phase 2. This suggests a strong desire amongst
Gentoo customers to pay for the measures over a period of time. Once works were complete there was a
high level of customer satisfaction and the feedback on the drivers behind the desire to get involved were
incredibly useful. The customer feedback showed us that saving money was often not the primary
driver...Mrs M Davison PAYS customer – “ instant hot water without the wait. Very happy with the works

Most of the properties are of a Concrete Block Cavity Wall type construction which required Structural
External Wall Insulation to make them structurally sound. The benefit of using Hanson Structherm’s
Structural External Wall Insulation for this purpose is that there is no need to decant the tenants as all work
was carried out externally. Decanting tenants on a project of this size would be a huge undertaking.

There were also a number of Wimpey No Fines properties which had all the problems associated with this
type of post war construction:

• Poor energy efficiency
• Condensation and mould
• Poor thermal performance

These have now been given a new lease of life with the application of the Hanson Structherm External Wall
Thermal performance has greatly improved with the U value dropping from 1.18W/m2K to 0.33W/m2K
resulting in each flat costing less to heat.

Lower heating requirements have resulted in a significant reduction of CO2 emissions.

The fresh, contemporary design of the buildings along with new high performance windows and enclosed
balconies has transformed the appearance of the blocks into modern and attractive buildings.

The Structural External Wall Insulation system was chosen ahead of others as it was the only system to be
able to offer a solution to the structural defects as well as meeting the client’s requirements for improved
thermal performance and aesthetic qualities.
The Structural External Wall Insulation has stabilised all the failing concrete infill panels and anchored back
areas of loose material, making the building safe.

The fresh, contemporary appearance of the building along with new high performance thermal windows,
solar panels and, internally, new wiring, kitchens, bathrooms, including a shower, and energy efficient
heating systems have helped transform Spencerbeck House into an iconic building which dominates the

The use of Hanson Structherm’s Structural External Wall Insulation system provided a cost effective method
of extending the life of the properties by remedying the serious structural defects. The system provided a
rigid, insulating, and structurally continuous envelope around each property, enhancing its stability and
anchoring back areas of loose material, using approved methods of structural repair.

The improvements made have given the properties a further life expectancy of at least 30 years and made
them mortgageable once again.

The physical appearance of the Daneville Estate has greatly improved, tenants and residents are happier
and the perception of the whole area has changed for the better. A range of different high quality impact
resistant render finishes have been used to great effect, transforming tired looking properties into homes
that residents are proud of.
The Structural External Wall Insulation was installed while they remained in their homes.

Thermal performance has improved greatly with the U value dropping from 0.96W/m2K to 0.25W/m2K.

The carbon footprint of each house has reduced by virtue of requiring less fuel to heat them to a
comfortable temperature. This has also had the positive benefit of reducing fuel bills for residents.

The aesthetic appearance of the properties has greatly improved as the refurbishment programme also
included new windows, doors, roofs, soffits, fascia boards and guttering.

There was no need to temporarily relocate residents as the Structural External Wall Insulation was installed
while they remained in their homes.

Thermal performance has improved greatly with the U value dropping from 4.08W/m2K to 0.22W/m2K.

The aesthetic appearance of the properties has greatly improved with the refurbishment programme also
including new windows, doors, roofs, soffits, fascia boards and guttering.
Thermal performance has improved greatly with the U value dropping from 1.79W/m2K to 0.28W/m2K.

The property now costs less to heat to a comfortable level and due to less heating being required the CO2
emissions have also significantly reduced.

The aesthetic appearance of the properties has greatly improved with the refurbishment programme also
including new windows, roofs, soffits, fascias and downpipes as well as the overhaul of the façade.

The Structural External Wall Insulation and steel repairs have made the properties structurally sound and

Thermal performance has improved greatly with the U value dropping from 1.75W/m2K to 0.29W/m2K.

A listed property was adjacent to the project therefore planning permission was not obtained for solar
evacuated tubes to be installed on the south facing roof of the property. Solar evacuated tubes were
instead installed at the rear of the property where they would not gain optimum solar gain.

Although the property was being upgraded to a high eco standard, it was important to also keep the
original style of the building, this included box sash windows. Although ideally in an eco retrofit a triple
glazed windows would be used instead, double glazed box sash windows were used. These were bespoke
windows made by Oakwood Joinery.

Although only double glazed box sash windows were used in the property the use of Airflex as an airtight
barrier in the rest of the building gave the building an airtightness of 4 air changes an hour.

The property was fitted with Halogen lights- using high amounts of energy and also creating a lot of waste
It was a challenge to clean-up at the end of each day to ensure that the occupants could still sustain their
standard of living in a clean environment – this reduced the amount of time to install measures.

It is important to allow time and cost for clean-up when the occupants of the building are there throughout
the installation of measures.

Full list available here
To facilitate customer support for the project and the smooth completion of the works, WPH located a
neighbourhood regeneration team in the heart of the estate, responsible for all customer consultation
functions. This included contractor and resident communications, to minimise disruption and to educate
customers in energy conservation.

The SAP rating of the homes improved by an average of 19 points.

Initially there was concern that the pepper potting effect of the EWI would make the streets look unsightly,
but the streets look improved and the overall effect is aesthetically pleasing. Several of the residents also
share these views. The houses were not uniform before the works commenced as several of them had
painted brickwork and alternate renders, if they had been the same the overall effect may not have been as
A consultation event was held for the residents of the Bowes Street Eco-renewal area. The event explained
the re-modelling plans to the residents and asked them to make decisions on certain aspects of the
improvement works.

The consultation brochure entitled “The time is now….” explained the level of resident involvement in
greater detail including the inclusion of a resident on the contractor decision making panel.

Having an in-house team including an RLO and two Building Surveyors, overseen by the head of unit,
ensures a consistency in service delivery and confidence in running a complex regeneration project. This is
supported by working with a variety of contractors that has enabled us greater flexibility and an
improvement in the effectiveness of the programming. As a result we are reaching more people and

It is crucial that expectations about the timescales, the scope of works and service expectations are well
managed from the outset. Through experience we are now better able to manage the varied expectations
of residents; this includes a new resident refurbishment guide, customer charter and an amended customer
satisfaction survey to improve feedback and customisation of the service.
There was some difficulty in obtaining larger quantities of hemp insulation that was used as an alternative
to mineral wool for sound proofing partition walls.

A variety of low VOC/eco-paints were used, the contractors found that the wall paints could be applied as
per standard paints, but the timber paints where harder to apply to the required standard. This led to
increased costs and delay

The design team found the mid construction open week helpful as it generated useful feedback and queries
from visitors.

Checking the sealing of gaps and vulnerable areas before signing off and proceeding to the next stage was
crucial in achieving improved results in airtightness and thermal imaging tests.

If we were doing this again, we would definitely fill the ground floor void with insulation – this seems to be
emerging as a generic retrofit solution for suspended ground floors. We would probably not use aerogel
insulation boards for IWI, instead because of its expense we would use small amounts of this material in
places where thickness is at a premium (e.g. for window reveals). We would probably not use an exhaust air
heat pump again, and we are now experimenting with 'semi-ducted' heat recovery room ventilators
(HRRVs) for providing whole house ventilation in retrofitted existing dwellings.

The project has underlined the crucial role of the architect (or some equivalent professional coordinator) in
managing the overall retrofit specification and ensuring first the continuity of the insulation envelope and
air barrier and second the proper interaction of the various elements of the retrofitted building fabric and
building services.

Customers have been tracking their consumption and CO2 emissions through the real-time display meters.
From this we are developing a matrix that will include energy saved, costs and CO2 saved, electricity
generated - this will be measured against house and household type.

Whitechapel TwentyFifty is giving Places for People the opportunity to look closely at the barriers that exist
in creating a low carbon scheme. Data from the project will be used to create new financial models to fund
schemes across the UK.
The houses will be monitored to provide energy efficiency data that we can use in the future to
demonstrate the success of the Passiv Haus scheme. The extent to which a Retro-fit can be taken very
much depends upon the condition of the property to start with. If in need of a total refurbishment as these
two properties were, then it becomes feasible, but if a property has already had money spent on it to
improve the condition then much of this work will have to be undone.

The Valueworks Supply Chain Management tool used on this project proved to be a very valuable tool in
managing the supply chain. All new components installed to each property are now registered in a database
meaning a comprehensive maintenance and life cycle replacement forecast can be established.

The Fusion 21 framework agreement allowed contractors to be selected based on their proven track record
of delivering a first class service - this was critical in reducing some of issues which may have caused
challenges to the project. The Valueworks supply chain management systems delivered excellent value for
money through the various material and labour supply valuations and costing.

Due to the scale and number of activities scheduled on the project, it was critical that the disruption to the
residents was kept to a minimum. The engagement of Tenant Liaison Officers (TLO) by the contractor
played an essential part in keeping the lines of communication open with the residents, thus reducing the
number of complaints.

Riverside and Starfish Communities have run a community engagement and behavioural change
programme including home visits and community events so that tenants and residents get the most from
the energy efficiency works done to their homes.
Although SIG Energy Management has previously installed both solar thermal collectors and air source heat
pumps, they had never installed them together on the same system, which did lengthen the installation

The flat being unoccupied proved to be advantageous in terms of accessing the property and disruption
caused by the different trades being on site.

It was realised early on that the hot water that would be generated by both the solar thermal collectors and
the air source heat pump would not be used as there was no tenant. This could not only cause damage to
the system, but could result in contamination of the water with legionella. This issue was solved by linking
the system with the laundry room downstairs in the Community Centre and offering free laundry facilities
to local residents that used the Centre.

Successful collaboration is dependent on communication. SIG Energy Management held the responsibility
of ensuring all parties involved were properly informed at every stage of the project, and this will continue
until the project is completed.

SIG Energy Management and IRT must work closer with housing associations in the future to ensure that
factors such as the weather do not disrupt the programme of work.
Achieving air tightness that meets the Passivhaus standard is difficult for new builds let alone retrofits so
ensuring all gaps and draughts were eliminated proved a large task. Much effort was put into making the
property as thermally efficient as possible and sometimes this incurred extra cost.

Filling the gap between the gable wall and the neighbouring property proved very expensive and better
initial planning may have produced a better solution.

To reduce scaffolding costs, it was important to ensure that it could be used for both roof works and also
for wall insulation installers – clearly the exact positioning of scaffolding to allow for both is crucial.

Roof insulation rather than loft insulation improved the airtightness of the property and reduced thermal

If repeating the project, GB Building Solutions would try to complete the street works in a shorter amount
of time, to further minimise disruption for residents, particularly those with cars. An alternative car park
was provided while the street works were undertaken, and residents could still reach their properties on

It is also recommended to work with known and trusted companies across the whole supply chain, and that
if this isn’t possible, to obtain a recommendation for a supplier or contractor from a trusted third party.

During the installation Bristol City Council chose to make extra investments in the groundwork surrounding
the building. This was to ensure that in future should scaffold access be required again, the ground will be
suitable for its installation i.e. future proofing against future works.

It is Bristol City Council’s experience that in the long run it is more efficient to install all measures at one
time rather than staggering works. This is particularly so for high rise buildings where access costs can be
very high.

Key to any successful installation project is good tenant liaison. Before, during and after the installation at
Holdroyd house, Bristol City Council, with support from SPSenvirowall, made sure that all their tenants were
fully aware of all aspects of the project. Making the building more efficient is also only one part of project,
it was also important to educate tenants on the measures being installed and how to live more efficiently in
the upgraded building.
Although the contribution required from residents on this scheme was very small this did not guarantee a
high take up and it was necessary to educate property owners about the benefits of the offered measures.
Many residents had not seen EWI installed before and didn’t realise that as well as reduced heating costs, it
has other benefits including damp and mould growth elimination.

It was beneficial that some properties in the area, owned by Newport City Homes, were in the process of
being refurbished allowing residents to see the aesthetic uplift of EWI and appreciate the value of the

All parties involved conducted events for residents to emphasise the benefits of the measures and answer
any concerns, these proved to be very popular and were key to such a high private take up.

Achieving very high levels of air tightness was a challenge for the whole team. The project demonstrates
that extremely good air tightness results can be achieved, even on projects where the original structure of
the house is left intact.

Coordination between different technologies required detailed discussions with the trades and for them to
communicate well with each other. Regular visits to site by the designers and good team communications
ensured a very high level of coordination. Whenever a problem did occur this could usually be traced back
to poor communication or somebody operating independently.

The project as a whole was costly due to the research and design that took place on the drawing board and
on site but individual parts are more replicable – particularly the EWI at the back of the house with
integrated gutter and verge interface developed by the architects.
Planning permission for the installation of exterior insulation was required. This involved consultation with
Stoke-on-Trent City Council and an exterior insulation specialist.

During the survey, difficulties arose in accurately documenting the efficiency, age and rating of the
property’s boiler. This information was obtained by referring to the Sedbuk boiler efficiency database.

The locations selected for this programme were deprived areas that have previously been involved in
partially completed local government schemes such as building clearance. Proposed plans of investment
and development in these areas have failed to materialize. Because of this the local inhabitants have pre-
conceived ideas about being ‘let down’ by initiatives which has affected interest and support in the scheme.
Multiple repeat visits by our surveying teams to these properties were required to counteract this reticence
and highlight the potential benefits.

Multiple visits to support the householders through the process are key to ensuring measures are

Fundamental to the success of the project was the selection of a property according to the cost of retrofit
and the willingness of the residents to cope with the disruption.

There was a requirement for United House and Camden Council to keep the residents informed of works,
including the impact of the work in progress and detail of physical and visual impact. In addition, special
procedures were agreed for contractor staff while the works were in progress to enable the residents to be
able to continue living in the house.

The house will be monitored over two winters to check that the energy saving elements perform as
Cellular PVC cladding in a dark colour such as this is highly efficient at absorbing heat so an efficient
ventilation system is required behind the cladding to prevent overheating. This consisted of a 25mm air
gap, vented at both the top and bottom of the clad area.

The main challenges faced were the specification of an efficient, thin PIR board for the main insulation and
the production of non-standard cladding profile lengths, both of which were to be achieved within a tight
budget. Both were overcome by the manufacturers working closely with the contractor to achieve the
required U value without compromising the appearance of the installation.

The manufacturers were able to suggest solutions that fitted the requirements of the client and contractor,
demonstrating that the early involvement of product manufacturers in the problem solving process pays off
in the long run.

One of the clear lessons learnt from the project was that the product is surprisingly easy to fit. The head
electrician on the project quoted as much when asked to comment on the project. The VPhase is suitable
for both retrofit and new build installations, although the easiest time to fit one is at the same time as a
rewire or fitting a new consumer unit. With an electrician already on-site, the incremental time and cost of
installing a VPhase is negligible.

Educating tenants was found to be a critical aspect of this project. Ensuring tenants understood that there
would not only be minimal disruption, but that the nature of the technology meant there would be no need
to change lifestyles or behaviour to achieve the energy savings (a key claim of the VPhase device), proved
to be an essential element of managing this project to avoid disruptions from and to the tenants.

Due to the number of products and technologies generously donated by sponsors there were some
difficulties with programming and arranging specialist installations to fit in with the work schedule.

Planning permissions also caused a slight delay as the original plans submitted needed amendments.

These challenges caused a slight delay with the project. When incorporating specialist technologies within
a project of this nature we need to ensure the installations teams are familiar with the products and how to
handle them.
Given the complex nature of the project: buildings, location and residents, there are a number of key
findings which contribute to the obstacles to improved energy efficiency in Westminster. These include (in
suggested order of importance):

1. Occupancy - the inability to review findings with all residents suggests that wide scale implementation of
energy efficiency measures will be very difficult in blocks of flats. The failure to get all leaseholders to
participate is thought to be due to 2 main reasons. Firstly, a lack of interest in carrying out energy efficiency
works. Secondly, their absence from the flat for large periods of time (some flats were second homes).
2. Legal framework - although not explored in detail (because the project flailed before the implementation
stage) it was clear that the leases used generally had no provision for energy efficiency improvements to
the common elements of the building. Amending these leases would be a time-consuming and expensive
3. Planning restrictions- all of the buildings were in conservation areas or listed, this severely restricted the
cost-effective measures that could be made to the common parts.
4. Perceived hassle.

[Any lessons learned?]
The residents can’t wait to move back into their newly renovated homes and begin to enjoy the benefits.

As with most socially deprived estates, vandalism was a reality that had to be overcome. By ‘sharing’ the
scheme with the community and helping them develop a new feeling of a regenerated community spirit,
this project has overcome not only the normal challenges in terms of design, aesthetics and carbon
reduction targets but has helped re-build a community that had been deprived and ignored for many years.
Based on the positive results of the pilot, Wolverhampton City Council are establishing a Low Carbon Grant
Service in the new year in the ABCD area to include Sempatap Thermal as one of the measures and this will
be made available for fuel poor households in hard to heat homes across the city.

The company is very pleased with the outcome and the paybacks were as predicted. The resulting evidence
base of behavioural and tangible measures could be compared to recognise their relative merits.

The paybacks all met the required levels.

The added advantage of Enhanced Capital Allowances identified by the green energy centre further
enhanced the cash generation of the project.

Post installation the staff reduced consumption further by only using ¾ of the new lighting.
This project demonstrated that even when working with ‘familiar’ technologies there is a significant lack of
skills throughout the supply chain from specification to installation.

Building stock and people need to be:
• Adaptable
• Flexible

To work at scale need to:
• Collaborate
• Trust
• Commitment
• Take risks

Estimated property value increase: £10,000 - £15,000.

Regular communications to all stakeholders are vital.

One of the biggest learnings identified by all boroughs was improving the referral process to maximise the
number of installations that happen as a result of the RE:NEW intervention. There are three strands to this:
firstly, the ability of assessors to make correct referrals, secondly, simplifying the referral process and
thirdly, better supply chain management.

Residents who received marketing from multiple touch-points were more likely to take up the scheme. For
example, where someone had received a letter (branded by the local authority, which also increased take-
up), saw a stand at a local community event and also received door-knocking, were more likely to take it up
than someone who just received door-knocking.
                          Measures                                         Scale

LI   CWI EWI IWI     Other    Heating Glazing Microgen   Other   Single Several Street
          x                                                                x

x     x       x       x         x       x        x                         x
x   x

x   x   x   x   x   x   x   x

    x   x                       x
x   x   x   x   x   x   x   x

    x           x
                x       x

x   x   x   x   x   x   x
x   x   x   x   x

x               x
x   x   x

x   x   x   x

x               x

x       x   x

x               x

    x   x   x
    x       x

x   x   x   x
x   x   x

x   x   x   x
x       x   x       x   x   x       x

x   x   x   x   x   x   x   x   x
        x   x   x       x       x

    x   x   x   x   x   x       x

*               *       x   x       x
    Passive   None   x   x   x

x              x
        x               x   x    Voltage     x

x   x   x   x   x   x   x   x       x
x   x   x   x   x   x   x   x

x   x           x

    x                           x
x       x

x   x       MVHR   x
x   x   x       x   x       x   x

x           x           x   x       x
        x                        x

             Voltage         x

x   x                    x
    Advice   x

x                x
x       x

x   x

x       x   Controls /    x

x            Controls /   x
x             x              x    x    MVHR   x

x    x   x    x    x    x    x    x     x

21   7   35   16   13   20   20   23    14    16   16   5
Scale                     Domestic             Non-Domestic        Geography

        Area    Owner      Social    Private   Owned Rented England Scotland Wales
               occupied   housing    rental
                             x                                         x

                             x                                 x
    x   x

x   x   x
x   x

x   x
    x   x

x   x   x
x       x

x   x
x   x

x   x
    x   x

x   x   x
x   x   x

    x   x
x   x   x

x   x       x
    x   x

    x       x

x       x
x   x

x   x
x       x   x

    x       x
    x   x   x   x

x       x       x
x   x

x   x

x   x
    x   x       x   x

x   x   x   x       x
        x   x

x   x           x
    x       x

x   x   x   x

        x   x
x   x   x       x

        x   x
x   x   x   x

        x       x
x   x

x   x

x   x
x       x

    x   x
        x   x

x   x   x       x
x   x   x       x

            x   x

            x   x
          x                         x

x    x    x    x           x

16   15   44   4   3   1   44   4   4

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