Interior Basement Waterproofing

Interior basement waterproofing in the GTA runs $80–$120 per linear foot. A typical Toronto semi-detached requiring full perimeter treatment (100–120 linear feet) costs $8,000–$15,000 including sump pump. Partial treatment of one or two wet walls runs $3,500–$7,000. All prices include labour, materials, concrete restoration, and lifetime warranty.

Yes — with one important distinction. Interior waterproofing captures and removes water after it enters the wall rather than stopping it at the source. The drainage channel and sump system provide a permanent managed path for groundwater, eliminating pooling on your floor indefinitely. The system functions as long as drainage channels are clear and the sump pump operates — both maintained with simple annual checks.

Most residential interior waterproofing projects in the GTA are completed in 1 to 2 days. A partial treatment (one or two walls) is typically a one-day job. Full perimeter treatment on a larger basement may take 2–3 days. The concrete patch requires a 24-hour cure before foot traffic. You can remain in your home throughout.

Installation requires removing the bottom 12–18 inches of any finished wall along the treated perimeter, plus the floor strip along that edge. We remove only what is necessary. We provide clear scope documentation so there are no surprises, and restoration of finished surfaces is completed by homeowners or their contractors after waterproofing is complete.

Our lifetime transferable warranty covers the waterproofing system against water entry failure for the life of the home — and transfers to the new owner when you sell. GTA buyers actively look for homes with existing waterproofing warranties, and a Canada Waterproofers warranty adds measurable value at resale.