Basement Waterproofing in Ajax, Ontario

A wet basement is more than an inconvenience — it's a threat to your foundation, your air quality, and your home's value. If you're seeing water stains, efflorescence, musty smells, or cracks in your foundation walls, your home is telling you something.

Durham Basement Pros keeps Ajax basements dry — from 1980s-era homes in Westney Heights to newer builds in Nottingham and Audley, we know exactly how water behaves in Ajax's clay-heavy soil — and how to stop it for good.

Our Waterproofing Services in Ajax

• Interior waterproofing systems (perimeter drain, sump pump, vapour barrier) — ideal when excavation isn't practical. Typical Ajax home: $3,500–$15,000.
• Exterior waterproofing (excavation, membrane, drainage tile) — the gold standard for recurring leaks in older Ajax homes. Typical: $8,300–$15,500.
• Foundation crack repair — injection repair typically from $400; most cracks fixed in half a day.
• Sump pump installation & battery backups — typically $1,500–$4,000 installed.

Why Ajax Homes Get Wet Basements

Much of Ajax — Westney Heights, Riverside, Pickering Village — was built in the 1970s–90s on dense clay soil with a high water table. Original weeping tiles clog, exterior membranes degrade, and every spring thaw or summer downpour pushes water against aging foundations. Add Durham Region's freeze-thaw cycles opening small cracks wider each year, and even homes that were dry for decades start leaking.

Neighbourhoods We Serve in Ajax

…and everywhere in between. We also serve Pickering, Whitby, Oshawa and Scarborough.

What Our Ajax Customers Say

We're building our review record one dry basement at a time. Every review we publish will come from a real, completed job right here in Durham Region — never written by us. See our reviews page →

Basement Waterproofing FAQ — Ajax