Every home is at risk of basement flooding, even if there has never been a flooding incident. Water in your basement is most likely to occur when there’s been a heavy rainfall, snow is melting or we’re experiencing a spring thaw. The good news is that you can prevent or at least reduce the chance of this happening.
Causes of basement flooding on private property:
There are a number of reasons why basements flood. Flooding can occur:
When stormwater or ground water seeps into the home (drainage failure):
A crack or leak in your home’s foundation, basement walls, or basement windows or door.
Poor lot grading or drainage
Failure of the weeping tile system (foundation drains)
Failure of a sump pump (in some homes) used to pump weeping tile water.
Leaking or plugged downspouts
From a sewer backup:
When waste water from the sanitary system or a combination of waste water and stormwater from the combined sewer system back up into the property, usually through fixtures tied to the sanitary sewer lateral, including the floor drain, toilets, sinks, showers and laundry fixtures located in the basement.
A sewer backup can result from a blocked connection between your home and the main sewer in the street, a sewer main backup or when the sewer system becomes overwhelmed with stormwater.