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SOLID WALL INSULATION

VIEWS: 163 PAGES: 4

									                               SOLID WALL INSULATION
By National Insulation Association: http://www.nationalinsulationassociation.org.uk, 01525
383313

The UK’s housing stock is estimated at approximately 24.5 million dwellings, of that
approximately 36% consist of non-cavity wall construction – solid brick, solid stone, pre 1944
timber frame and non-traditional, i.e concrete construction.

Improving the thermal efficiency of solid-wall properties is an area which has massive
potential for the future as this is an area where very little work has been done to date.
However, more and more individuals are now starting to recognise the advantages of
insulating such households and this is an area which is now seeing a real growth with many
effective cost-effective solutions now available.

The benefits of solid wall insulation
If you live in a home with solid walls, 45% of your heat is escaping through the walls which is
costing you money. Insulating the walls will dramatically prevent heat loss in the winter (and
also reduce heat gain in summer) in addition to:

Reduces your energy consumption for heating leading to

Greater warmth and improved comfort
Less risk of ill health
Lower fuel bills
Less fuel debt and fuel poverty
Reduced maintenance
Increased value of property
Minimises damage to the environment

                                    Annual Saving           Installed Cost          Installed
          Measure
                                       (£/yr)                      £                Payback
                                                                Around
Flexible Thermal Lining                £90 - £190
                                                                £35m2
  Rigid Thermal Board                 £210 - £260            From £40m2
   External Cladding                                                                From 7
                                      £220 - £270             From £1800
        /Render                                                                      years

How does it work?
A solid wall can be insulated either internally or externally – either option will greatly increase
comfort, while also reducing running costs and the associated environmental impact.

Internal Insulation typically consists of either dry lining in the form of flexible thermal linings
available in 1 metre by 12.5 metre rolls, laminated insulating plasterboard (known as thermal
board), or built-up system using fibrous insulation such as mineral wood held in place using a
studwork frame.

External Insulation systems comprise of an insulation layer fixed to the existing wall, such as
a protective render or decorative cladding. Dry cladding offers a wide range of finish materials
that can be used – Timber panels, Stone or Clay tiles, Brick Slips or Aluminium panels.

 --------------------------------------------------------------------------------

 Which Material ?
Flexible Thermal Linings and almost all brands of thermal boarding provide extremely high
thermal efficiencies in regard to thermal insulation. Therefore, it is possible to achieve a very
high level of thermal performance using relatively small thicknesses of insulation (which can
be a major asset for small dwellings).
A combination of both insulated studwork and thermal board (instead of just finishing off with
ordinary plasterboard) can be used to increase the thermal performance and further reduce
running costs.

This method can be especially advantageous where the internal wall face is uneven, because
time spent preparing the internal wall face is reduced. The combined method also helps
reduce thermal bridging.

Most external renders consist of either thick sand/cement render applied over a wire mesh, or
a thinner, lighter polymer cement render applied over a ‘GRP scrim’. A pebbledash render
should need less maintenance than a painted render finish.

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Internal Flexible Thermal Linings
Flexible thermal linings are insulation on a roll specifically for use in solid wall homes,
mansard roofs and dormer ceilings. The lining is 10mm thick and supplied in rolls one metre
wide, 12.5 metres long. The material is made from a natural product – latex - in an open and
closed cellular construction and has a durable fibreglass face that can be decorated with
emulsion, wallpaper or even tiled.
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Internal Rigid Thermal Boards
Thermal boarding is a composite board made of plasterboard with a backing of insulation.
The insulation backing can be specified in a variety of thicknesses. Insulation in excess of
60mm will typically be required to achieve best practice performance. Thermal boards are
fixed to the wall surface using continuous ribbons and dabs of adhesive, plus additional
mechanical fixings.

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External Insulation
External insulation systems are made up of an insulation layer fixed to the existing wall (using
a combination of mechanical fixings and adhesive, depending on the insulation material used)
and a protective render or cladding finish.
--------------------------------------------------------------------------------

FLEXIBLE THERMAL LININGS

Flexible thermal linings are insulation on a roll specifically for use in solid wall homes,
mansard roofs and dormer ceilings. The lining is 10mm thick and supplied on rolls one metre
wide, 12.5 metres long. This provides an immediate improvement in the thermal comfort as it
is not necessary to heat the thermal mass of the house.

Composition & Durability
The material is made from a natural product – latex - in an open and closed cellular
construction and has a durable fibreglass face that can be decorated with emulsion, wallpaper
or even tiled.

• Flexible thermal linings have been tested by the National Physical Laboratory – May 2001

• Approved by the Energy Saving Trust as an energy saving product for inclusion in the
Energy Efficiency Commitment Scheme. June 2001.

• Is an Energy Saving Trust ‘Recommended’ product for the insulation of solid wall homes.
Oct 2004

• BRE Assessment of energy savings for SEMPATAP THERMAL on Mansard roofs and
Dormer ceilings. Sept 2005

• EST Approval for SEMPATAP THERMAL used on Mansard roofs and Dormer ceilings. Oct
2005
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Properties

1 Thermal conductivity:
The measured thermal resistance is 0.158m2K/W Building Research Establishment
calculated kilowatt savings. B. Anderson May 2001, Feb 2005

2 Density:
Typically 2.08kg/m2

3 Fire:
Tested by Loss Prevention Council
(a) Fire propagation to BS 476 part 6. - Nov 1997
(b) Large scale surface spread of flame to BS 476 part 7. - Nov 1997
SME, Fire propagation M1, M2 Sept 2005

4 Water:
The material is moisture vapour permeable and will not trap moisture in the substrate.

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Application

1 Survey:
A pre-installation survey is carried out to calculate internal wall measurements and identify
levels of preparation.

2 Site Preparation:
All wallpaper applied to inside of external walls is removed and sound painted areas are
cleaned ready for the application of adhesive. Porous or powdery surfaces must be pre-
primed with the appropriate primer. If in doubt contact the manufacturer for specific
recommendations. If necessary apply skirting channel with suitable no nails type adhesive
and allow to dry.

3 Installation Procedures:
Cut drop lengths of the Flexible thermal lining allowing 2-3cm overlap at each end. Apply the
system adhesive directly to the wall for the first metre width. Hang cut length and smooth out
to remove any air bubbles. Trim top and bottom . The operation is repeated along the length
of the wall to be insulated. However when the adhesive is applied to the wall for all
subsequent lengths it is also applied to the joining edge of the previous piece. On all outward-
facing corners and reveals etc. Edging Tape is used to form a neat and protective corner
finish. All joints with the ceiling, untreated walls, skirting and between the hung lengths of the
thermal linings are sealed with the system sealant.

4 Making good:
The insulated wall areas can then be decorated with emulsion, wallpaper or even tiled as
required.

5 Material available from:
Mould Growth Consultants Ltd
McMillan House Cheam Common Road, Worcester Park Surrey, KT4 8RH
Tel: 020 8337 0731 • Fax: 020 8337 3739
Web Site: www.mgcltd.co.uk • E-mail: info@mgcltd.co.uk

Full Application Instructions and training for contractors is also available Free of Charge from
the Supplier

EXTERIOR CLADDING/RENDER
External insulation systems are made up of an insulation layer fixed to the existing wall (using
a combination of mechanical fixings and adhesive, depending on the insulation material used)
and a protective render or cladding finish.

Composition & Durability
Wall-Reform is an innovative new product that has been designed as an energy saving
plaster/render that insulates and Wall-Reform is an innovative new product that has been
designed as an energy saving plaster/render that insulates and transforms any wall.
A cement-based render coating, containing expanded polystyrene beads and other additives
which when mixed together form Wall-reform. The system can be used as an internal or
external application.

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Properties

1 Thermal conductivity:
0.055 W/M2/K

2 Density:
204.6 kg3

3 Fire:
Class 0 surface spread of flame

4 Materials in Contact:
Whilst application work is ongoing protection required to adjacent surfaces

5 Water:
Moisture vapour permeable

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Application

1 Survey:
Survey existing property externally and make good to any existing problems ie leaks, mould
growth, flaking surfaces etc

2 Preparation:
Erect Independent scaffolding system, remove all extraneous items, rwps, aerials, satellite
dishes wiring etc, remove any loose existing render, provide protection to adjacent surfaces
and access paths

3 Installation:
Apply WallReform in 3 coats to a total thickness of 40mm, provide reinforcement mesh at all
reveals. Install coated metal and upvc beads and trims, and apply maintenance free Acrylic or
Silicone thin coat decorative render finish

4 Making good:
Redecoration should not be necessary. The finish can be power washed. However a paint
application can be made if required.

5 Post Survey
Preliminary survey and specification information can be obtained from:
1st Insulation Partners Ltd
Insulation House, Shaw Road, Rotherham. S65 1SG

Tel: 01709 365785 • Fax: 01709 365786
Website: www.firstinsulation.co.uk • Email: office@firstinsulation.co.uk

								
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