How to prevent basement flooding in 2026

Most basement water problems start because certain easy to implement solutions are not in place. Address these early to get the lead on Ottawa’s unpredictable climate. Here are a few things we tell homeowners to address.

1. Redirect downspouts

Downspouts should be redirected to at least 3 meters away from the foundation, ideally into permeable areas. Ottawa City’s Rain Ready Ottawa program can provide rebates to homeowners in priority areas to support the installation of rain barrels onto your property.

2. Sealing cracks and openings

Ensure any cracks in the walls, floors, window wells and the foundation are properly sealed

3. Proper slope of the ground

Check the slope of the ground: it should fall away from the foundation so snow melt and rainwater drain away from the home

4. Cover that egress window

Install a basement egress cover, if relevant, to prevent snow buildup in the hollow that can seep into the window frame

5. Garbage down the drain

Don’t throw garbage, grease or other hazardous waste down your drains, especially if your downspouts are connected into your sewer. This can cause blockages and increase risk of flooding

6. Proper foundation drain direction

Foundation drains should drain into the storm water sewer and not the sanitary sewer

7. Clear some snow away

Snow can be cleared away from the foundation to prevent snowmelt from running seeping into walls

Need help with any of these? Let us know

Preventing a leak is the difference between some sweat, a few hundred dollars and a major repair. Bookmark our seasonal basement maintenance checklist so nothing slips through the year. We offer free inspections across Ottawa, including Kanata, Orléans and beyond. Book your free inspection.

Local pages: Basement Waterproofing Kanata · Basement Waterproofing The Glebe · Basement Waterproofing Hintonburg