Basement Waterproofing in Mississauga
We fix the leak at its source: full exterior excavation, or an interior drainage system where you can't dig.
Waterproofing That Lasts
Water gets into a basement through a worn foundation coating, cracks in the wall, or weeping tile that stopped draining years ago. We find the cause on site and fix that, not just the stain on the drywall.
- Excavation down to the footing
- Foundation repair, coating and dimple membrane
- New weeping tile in clear stone
- Interior perimeter drains, membrane and sump
Exterior Waterproofing
We excavate to the footing, clean and parge the wall, apply foundation coating, install a dimple membrane, lay new weeping tile in clear stone, and backfill. Water never reaches the concrete.
Interior Waterproofing
When there's a deck, a driveway or a neighbour's wall in the way, we work from inside. We cut the floor along the walls, install a perimeter drain and membrane, connect it all to a sump, and re-pour the floor.
Recent Work
Photos from real jobs our crew has done.
Questions
How do I know I need waterproofing?
Look for a musty smell, white chalky marks on the walls, water along the base of the wall after rain, or a crack that weeps. Book an inspection and we'll show you what's going on.
Exterior or interior?
Exterior stops water before it reaches the wall. Interior manages water that gets through, and it's ideal under decks or on tight side yards.
Do you replace clay weeping tile?
Yes. We dig it out and replace it with perforated pipe, filter sock and clear stone.
Visit or Book an Inspection
We're at Hurontario & Dundas in Cooksville, central to every Mississauga neighbourhood.
MSA Underpinning & Basement Waterproofing Mississauga
3025 Hurontario St, Ste 306
Mississauga, ON L5A 2H1
Free on-site inspections and written quotes.
Wet basement? Want a basement apartment?
Book a free on-site inspection anywhere in Mississauga. You'll get a straight answer and a written quote, with no pressure.