Basement waterproofing in Grimsby.
The summer 2026 storms flooded basements in Grimsby and its neighbours. We find where the water gets into yours and stop it, from leaking cracks to failed weeping tile, backed by the No Leak Guarantee.
After the summer of 2026.
On July 21, 2026, heavy rain under a severe thunderstorm warning caused localized flooding across Grimsby, and the Town asked residents with flooded basements to call in. More storms followed in late July and early August, causing close to $360 million in insured damage across parts of Ontario, with Grimsby named among the communities hit by flash flooding.
Storm water gets into a basement one of two ways. It backs up through the floor drain from an overloaded sewer, which is a job for a licensed plumber and a backwater valve. Or it comes through the walls, cracks, window wells and floor-wall joint, which is our job. We'll tell you honestly which one you've got.
Grimsby sits between Lake Ontario and the escarpment, with Forty Mile Creek and several smaller creeks running down to the lake. Near the lake, groundwater can be shallow: one lakefront site investigation found it as little as 1.8 metres down. That's why drainage around the foundation matters as much as sealing it.
Basement problems we fix most in Grimsby
- Water through the walls or floor after heavy rain
- Leaking cracks in block and poured walls
- Sump pumps that failed or fell behind in the storms
- Window wells that filled and leaked
- Damp, musty basements near the lake
- Weeping tile that's clogged or collapsed
Where we work in Grimsby
We keep basements dry across Grimsby, including:
Grimsby questions, answered
Is there a Grimsby rebate for flood protection?
Do I need a permit for this kind of work?
Should I fix the walls or the drains first?
Walls moving, not just leaking?
Underpinning, bowing walls and foundation rebuilds go to AVH Foundations, our structural crew. Same company, same phone number.
What homeowners say
Basement Worx is owned and run by AVH Foundations, so these are AVH reviews. Straight from Google.
“Perfect! Alex came same day to assess the damage and what needed to be done after I was ghosted by an unscrupulous contractor. Returned as agreed, on time, and completed the job beyond my expectations. Would highly recommend.”
“They truly care about their customers and take pride in their work. The crew was friendly and knowledgeable, and they used top-notch materials. My foundation problems were resolved efficiently, and I appreciate their dedication to quality.”
“Alex and his team were fantastic. Super quick response, same-day service. He explained and educated me. Would highly recommend.”
Also working near Grimsby.
Grimsby is the eastern edge of our area. We also keep basements dry in these nearby towns.
Basement leak or foundation issue? Don't wait till it's too late.
A free, no-pressure quote from the people who'll actually do the work.