How to Avoid
2. Downspout - Disconnection
3. Grading Around the House
1. Backwater Valve
2. Downspout - Disconnection
1. Backwater Valve
3. Grading Around the House
4. Sump Pumps
Back water valves may help with sewer water backing up and possibly damaging or causing water
related damages in the basement. They activate when water reverses and tries to flow into the house.

Backwater valves should be installed by a licensed plumber and require a building permit to be installed.
They also need to be maintained and regularly inspected according to product specifications.

The City of Toronto offers up to $1250 in rebates to offset the cost of a backwater valve under the
Basement Flooding Protection Subsidy Program. Other municipalities may have there own programs
such as
Halton Region, Region of Peel and City of Vaughan.

I also found an interesting video on maintaining a backwater valve which you should watch.
Click here
Downspout's that are directed underground and or which pool water near the foundation can be a
major cause of basement flooding. Redirection of a downspout is typically an inexpensive fix. There
are companies who can redirect your downspout's or you can do it yourself...check out the
YouTube video.

Neighbourhoods are requiring home owners and builders to direct all downspout's above ground,
away from the foundation and to ensure that these downspout's do not become a trip hazard and
are not directed to your neighbours house.

You may also want to check with your specific Municipalities Basement Flooding Programs, they
may have rebates on redirecting your downspouts -
City of Toronto, Halton Region, Region of Peel
City of Vaughan. Make sure you read and understand the details.
Grading around the house is very important in reducing basement floods. Grading has a tendency
of settling over the years so when you walk around your house look for areas which have settled
towards the house or dips and flat areas of grading which can allow rain water to pool near the
house or foundation, which is exactly what we are trying to avoid.

Some people like to lay out gravel or cement slabs, some use soil or wood chips after they have
planted shrubs or bushes (hopefully 3-4 feet away from the house). Just keep in mind that whatever
and the grading should drop 6 inches in the first 6 feet away from the home - look at the picture to
your right titled Measure for Proper Grading or
click here to watch a video..

You might have cement or interlock bricks around some areas of your house. These areas should
also have a slight slope away from the house to help with rain water. Also you should look to see if a
gap is present between the cement and house foundation wall. These gaps may allow water to flow
down between the grade and house and possibly into the basement. I would recommend that these
gaps be sealed with a flexible outdoor product to reduce the possibility of water entry. For these
type of cement grades a specialist should be consulted
A sump pump is part of a system which contains an under water pump located inside a circular
container which is typically installed in the basement.

This circular container is usually flush with the basement floor. The outside weeping tile which
surrounds the base of the house is connected to the circular container. If or when water enters the
weeping tile it may flow to the city and or as well into the sump pump container and then the sump
pump will push it to the outside.

It is important to make sure you regularly check to see if the sump pump works and you might even
want a back up pump and or even a back up battery in case the power goes out. Usually homes
located near lakes and streams or a re prone to flooding have back up generators, batteries and

Sump pumps can also be found in houses with basement that are close to high water tables such
as near lakes or streams. They can also be found if a wet basement specialist installs one as part
of a wet basement improvement.

Again there may be susbidies/rebates for installation of a sump pump -
City of Toronto, Halton
Region, Region of Peel and City of Vaughan. You may also want to check with your specific
Municipalities Basement Flooding Programs, they may have rebates on sump pumps. Make sure
you read and understand the details.
5. Additional Resources for Basement Flooding
5. Additional Resources for Basement Flooding
4. Sump Pumps
Downspout directed
dealing with possible health issues such as mold and or sewer waste should be incentive enough,
now your municipality may have rebates/subsidies to help you.

Here is some additional information from:

Canada Mortgage Housing Corporation (CMHC):
How to Avoid Basement Flooding and What
to do After a Basement Flood and Prevention of Basement Flooding due to Sewers.

Institute for Catastrophic Loss Reduction (ICLR): Hand Book for Reducing Flooding and 4
Videos on Reducing Basement Flooding.