Why Do Window Wells Fill With Water?
Wondering why your window well keeps filling up with water after rain? It’s a common issue in the GTA, especially during storms or snowmelt. Poor grading, clogged gutters, or a missing drain system can all cause excess water to pool around your basement windows. When that water can’t escape, it puts pressure on your foundation and may lead to a basement window well leak — one of the most common causes of basement flooding.
If you’ve searched “Why is water leaking through my basement window?” or “How do I stop my window well from flooding?” — you’re not alone, and you’re in the right place.
Problems Caused by Flooded Window Wells
Standing water in a window well isn’t just annoying — it can cause serious damage. Water can seep into the basement, ruin window frames, stain the glass, and even promote mold growth. If left untreated, these issues often lead to expensive foundation repairs.
Looking for help? See how our basement waterproofing services can solve your water problems for good.
Additional causes homeowners often overlook
- Downspouts discharging too close to the foundation
- Soil settling around the window well over time
- Frozen ground during winter thaws that blocks drainage
- Improperly sized or damaged window wells
These issues often develop slowly, which is why window well flooding can appear suddenly after years without problems.
Long-term Risks of Repeated Window Well Flooding
- Rotting wooden window frames
- Rusted metal window well liners
- Cracked or deteriorated foundation walls below the window
- Increased humidity throughout the basement
Even small amounts of repeated moisture can shorten the lifespan of your basement finishes.
Window Well Filling with Water? Here’s What to Do
Let’s break it down simply: if your window well floods every time it rains, here are three smart fixes that can make a big difference.
1. Install a Window Well Cover
Looking to stop rain or snow from getting into your window well? A durable window well cover is one of the best investments you can make.
These covers act like a protective lid, keeping out water, leaves, and debris. They’re especially important during Toronto’s rainy fall and snowy winters. Bonus: they also prevent pets or kids from falling in!
2. Install a Proper Drainage System
If your window well has no drain — or it’s clogged — the water has nowhere to go. That’s when flooding starts.
- Install a French drain or connect a drainpipe to your weeping tile system.
- Ensure the area is backfilled with gravel for proper filtration.
- Make sure water flows away from your home — not toward it.
Pro Tip: Pair your drain with a window well cover for double protection.
3. Perform Regular Window Well Maintenance
A little maintenance goes a long way. Clean out your window wells seasonally to remove leaves, dirt, and other debris that can block the drainage system.
Ask yourself:
“When was the last time I checked my window wells?”
If it’s been a while, now’s the perfect time to inspect them — before the next rainstorm hits.
Speak to a Local Waterproofing Expert
When window wells keep filling with water, it’s often a sign of a deeper drainage or foundation issue that needs professional attention. While temporary fixes may help in the short term, a local waterproofing expert can identify the root cause and recommend a long-term solution that protects your basement and foundation.
At GJ MacRae, our team has been waterproofing homes across Toronto and the Greater Toronto Area for over 45 years. We understand the region’s soil conditions, weather patterns, and common drainage challenges. From window well drains and covers to full basement waterproofing systems, we provide tailored solutions designed to keep water out permanently.
If you’re dealing with repeated window well flooding, basement leaks, or moisture issues, speaking with an experienced local contractor can save you time, money, and future repairs.
Still worried about water in your window well?
Let the pros at GJ MacRae handle it before it becomes a bigger issue. Our custom drainage systems and waterproofing solutions are designed specifically for the GTA’s climate and soil conditions.
Want personalized help? It’s time to contact experts and fix your window well because until now, it’s only the theory you learned; implementing it using different tools needs experts. Contact our team now for a free quote.
Call today or request a quote online. Don’t wait until you have a flooded basement!
