Through the walls (seeping, staining, or wet patches) Through the floor or floor-wall joint Through a visible crack in the wall Not sure / general dampness

2. Do you have access to the exterior of your foundation walls?

Yes — open yard, clear of obstacles Partially — some obstacles (deck, patio, landscaping) No — attached garage, neighbour's property, or no clearance

3. Is your basement finished (drywall, flooring, etc.)?

Yes — fully or partially finished No — unfinished / open walls

4. How severe is the water problem?

Minor — occasional dampness or humidity Moderate — visible seeping after rain or snow melt Severe — standing water, flooding, or active leaks

5. What is your primary concern?

Budget — I want the most affordable solution Permanence — I want the most thorough, long-lasting fix Minimal disruption — I don't want major digging or construction

Please answer all questions before seeing your recommendation.

Full Method Comparison

	Interior	Exterior
Addresses root cause	Manages water inside	✅ Stops water at source
Disruption to yard	✅ None	Excavation required
Disruption to interior	Floor perimeter cut	✅ None
Typical cost	✅ Lower	Higher
Works on finished basements	✅ Yes	✅ Yes
Requires exterior access	✅ No	Yes
Protects foundation membrane	No	✅ Yes
Best for	Managing recurring seepage	Long-term structural protection

Not sure which is right for your home?

Our specialists assess your foundation in person and recommend the most effective and cost-efficient solution for your specific situation — at no charge.

Book a Free On-Site Assessment →

📞 416-333-LEAK

Waterproofing & Drainage Assessment

Water in your basement? Start by finding the source.

Basement leaks can come from foundation cracks, failed drainage, hydrostatic pressure, sump pump problems, sewer backups or poor exterior water management. Tell us what you are seeing and we can help determine the right repair.

Get a Free Assessment → Call 416-333-5325

✓ Serving Since 1998 Experienced waterproofing professionals ✓ Warranty Protection Coverage on qualifying systems ✓ Licensed & Insured Professional Ontario contractor ★ BBB Accredited Read customer reviews

CANADA WATERPROOFERS Waterproofing • Drainage • Flood Protection

Canada Waterproofers provides basement waterproofing, foundation leak repair, drainage, sump pump, backwater valve and flood-prevention services for homeowners throughout Southern Ontario.

Main Offices

Toronto

51 Wolseley St, Suite 108
Toronto, ON M5T 1A5

Mississauga

3410 Semenyk Court, Unit 9
Mississauga, ON L5C 4P8

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Services

All Services
Basement Leak Repair
Interior Waterproofing
Exterior Waterproofing
Foundation Crack Repair
Sump Pump Installation
Backwater Valve Installation
French Drain Installation
Basement Underpinning
Sewer & Drain Repair
Emergency Service

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Service Areas

Toronto & GTA

Toronto Mississauga Brampton Markham Richmond Hill Ajax

Halton, Hamilton & Niagara

Oakville Burlington Milton Hamilton Grimsby St. Catharines Niagara Falls Brantford

Southern & Central Ontario

Kitchener Guelph Cambridge London Barrie

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Waterproofing service across Southern Ontario

We serve homeowners throughout Toronto, York Region, Peel, Halton, Durham, Hamilton, Niagara Region, Waterloo Region, Wellington County, Brantford, London, Barrie and surrounding communities. Visit our service area directory to find your location.

Contractor licensing & company information

Canada Waterproofers Inc. | Toronto Licenses: T94-4543511, P25298, B25300, T95-4543513, T85-4543510 | Oakville: 2023 100463 000 00 LICE, 2023 100455000 00 LICE | Mississauga: 2025 008967 TC, 2025008966 TM | Hamilton: 23 301959 00CL, 23 301960 00MA