Basement Flooding Guide by theelixer

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									     Why isn’t the City xing my drainage problem?
                                                                                                 Protect your home and possessions by
     Drainage standards have changed over the years.                                             understanding what causes basement ooding.
     On private property, renovating to meet current
     drainage standards is the responsibility of the
                                                              Protect Your Basement
     homeowner, similar to bringing a home’s electrical
     and plumbing systems up-to-date. Where large scale                                          Basement ooding is a serious problem that a ects                                                                                                                                                  City sewer systems:
     neighbourhood ooding problems exist, the City has
                                                                                                 residents in many municipalities, including the
     undertaken multi-million dollar projects to reduce the                                                                                                                                                                                                                                        Sanitary (wastewater) sewer – The sanitary sewer
                                                                                                 City of London. Basement oodings generally occur                                                                                                                                                  receives wastewater from toilets, bathtubs, sinks,
     severity of basement oodings.
                                                                                                 during snow melts and heavy rainfall and can cause                                                                                                                                                and laundry machines through your home pipes.
     In many circumstances, only improvements completed                                          serious damage and inconvenience. There are two                                                                                                                                                   The sanitary sewer is located under the street and is
     on private property will reduce the chance of ooding.                                       systems involved in basement ooding:                                                                                                                                                              connected to the nearest sewage treatment plant.
     These types of improvements must be undertaken
                                                                                                                                                                                                                                                                                                   Storm (rainwater) sewer – The storm sewer is
     privately by the homeowner.                                                                 1. Overloaded home drainage systems                                                                                                                                                               located under the street and carries surface water
                                                                                                                                                                                                                                                                                                   from lawns and streets, and groundwater from
     How much is this going to cost?
                                                                                                 2. Overloaded City sewer systems
                                                                                                                                                                                                                                                                                                   weeping tiles and foundation drains, through pipes
                                                                                                                                                                                                                                                                                                   to local streams.
     Each situation will be di erent. You should contact
     a master plumber to assess the potential cause of
      ooding and provide a cost estimate. While repairs
     on private property are the responsibility of the                                                                                                                                                                       RT
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                                                                                                                                                                                                                                              INE                                                  Home drainage system:
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                                                                                                                                                       Tile rain
     homeowner, the City of London o ers a subsidy to                                                                                            ep
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                                                                                                                                                                                                                                                                                                   Weeping tile/foundation drains – Weeping tiles
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     qualifying homeowners to improve home drainage                                                                                              Fo
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     systems. Please refer to the city’s Basement Flooding                                                                                                                     Ca
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                                                              Flooding Guide
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     Subsidy Program pamphlet for more details.                                                                    ildi
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                                                                                                                 S                                                                                  rm                                                                                             tiles should be connected to the sump pit, however,




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        Basement Flooding Subsidy Program pamphlet:                                                                                                                                   a   in
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                                                                                                                                                                                                                             er                                                                    Downspouts – Typically, downspouts carry rainwater




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                                                                          identify causes of
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        • Phone 519 661-2500 Ext. 2334;                                                                                                                     n                              ib
                                                                                                                                                       Sa                            ns                                                                                                            older homes, downspouts may be connected to your
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        • Visit City Hall, 8th Floor,                                     basement ooding                                                                    Ci t
                                                                                                                                                                    y                                                                                                                              weeping tiles or directly to the storm sewer.

          300 Du erin Avenue, London; or                                                                                                                                                                                                                                                           Sump pit/pump – A sump pit is dug into your
        • View our website, www.london.ca and enter
                                                                          and improve drainage                                                                                                                                                                                                     basement oor and collects natural groundwater from
                                                                                                                                                                                                                                                                                                   the weeping tiles. The sump pump moves the water
          “Basement Flooding” into the Search eld.
                                                                          conditions.                                                                                                                                                                                                              from the sump pit to the ground surface or to the
                                                                                                                                                                                                                                                                                                   storm sewer.
                                                                                                 Working together – Home drainage and
                                                                                                                                                                                                                                                                                                   Back ow preventor (full-port) - A back ow
                                                                                                 City sewer systems
                                                                                                                                                                                                                                                                                                   preventor is a device that prevents sewage from
                                                                                                 No municipal drainage system can guarantee every                                                                                                                                                  backing up into your basement from the City’s
                                                                                                 house complete protection against basement oods.                                                                                                                                                  sanitary sewer. The back ow valve automatically
                                                                                                                                                                                                                                                                                                   closes if sewage backs up from the sanitary sewer.
                                                                                                 Working together, we can help prevent ooding and                                                                                                                                                  Regular cleaning of the Back ow preventors is the
     Environmental & Engineering                              Environmental & Engineering        reduce costly upgrades to City systems.                                                                                                                                                           responsibility of the homeowner.
     Services Department                                      Services Department



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                                                                 There are a variety of causes of basement ooding.
        What is causing my ooding?                               The following cases describe a number of common ooding situations that can occur in London homes.




                                                                                                                                          Roof
             Roof                                                                                                                         downspouts
                                                                       Flexible pipe
             downspouts
                                                                       with adapter
                                                                                                                                          Water level


                                                                                                                                                                Water entering
                                                                                                                                                                basement
                                                                                                                                          Poor lot grading      through cracks
                                                                                                                                                                seams
                                                                        Groundwater                                                                             or window

                                                   Floor drain                                                                            Weeping tile                            Floor drain
                                                                                                                                          not working or
                                                                                                                                                                                                    City sanitary sewer
             Weeping                                                                                                                      non-existent
                                                                        Weeping
             tile                                                       tile                                          Sump

                                            Service connection                                                        Sump pump                                                                                                Service connection
                                            to sanitary sewer                                                         (not operating)
                                                                                                                                                             Service connection                                                to sanitary sewer

               A                                                          B        Exterior foundation drain system
                                                                                                                                              C              to sanitary sewer
                                                                                                                                                                                                     D
        Weeping Tiles and/or Downspouts                             Malfunctioning Sump Pump                                            Surface Water Causing                                   City Sanitary Sewer Pipe Full
        Connected to the Sanitary Sewer                             If your home is equipped with a sump pump,
                                                                                                                                        Basement Flooding
                                                                                                                                                                                                If the City’s sanitary sewer pipe is full due
        During heavy rainfall, the water entering the               it may have malfunctioned – causing your                            Basement ooding can occur when there is                 to large amounts of rainwater from various
        downspouts may cause the weeping tiles to over ow.          basement to ood.                                                    water ponding around your foundation walls              sources – such as private weeping tiles or from
        If your weeping tiles are connected to the sanitary                                                                             and/or your weeping tiles are not working or            neighbour’s homes – then sewage can back up
        pipes, this may cause rainwater or sewage to back up                                                                            are not existent.                                       into the basement.
        into your home.

                                 Solution                                                   Solution                                                         Solution                                                     Solution
        Disconnect weeping tiles and downspouts                     Replace your sump pump                                              Smart landscaping                                       Flood-proo ng devices
        from the sanitary sewer system                              Ensure that your sump pump is properly                              Check that the ground around your house is sloping      Homes prone to ooding should have sump pumps and
        Rainwater should not be entering the sanitary               maintained. If your sump pump has                                   away from your foundation wall. This reduces            back ow preventors to prevent rainwater or sewage from
        (wastewater) sewer system. Have a quali ed plumber          malfunctioned in the past, consider contacting                      the possibility of water entering through cracks in     backing up into the basement. Talk to a quali ed plumber
        disconnect your weeping tiles and downspouts from           a quali ed plumber and having it replaced.                          your foundation or overloading the weeping tiles.       about the best way to ood-proof your basement before
        the sanitary sewer system. Install a sump pump and                                                                              Direct your downspouts where water can be easily        any device is installed. Each installation is di erent and
        back ow preventor to send the rainwater to the ground                                                                           absorbed, such as your lawn or ower bed.                some devices require a plumbing permit. Be sure to get
        surface or to the storm (rainwater) sewer system.                                                                                                                                       at least three estimates before hiring a plumber.
                                                                                                                                                                                                Check your local Yellow Pages or Better Business Bureau
                                                                                                                                                                                                for a list of suppliers and contractors. Hardware, home
                                                                                                                                                                                                improvement, plumbing outlets and suppliers o er
                                                                                                                                                                                                information and equipment for do-it-yourself installations.




BasementFlood_Brochure3.indd 2                                                                                                                                                                                                                      2/13/09 5:10:29 PM

								
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