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A wet basement in Toronto is rarely a basement problem — it's water that got past the roof, the grading or the foundation wall. We fix the wall and trace where the water came from.(416) 846-3797Or send the form and we'll call you back.
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Toronto foundations come in three kinds and each fails differently. Pre-1930 houses downtown and in the west end often sit on rubble stone or early block — mortar joints that have washed out over a century, letting water through in sheets rather than at one crack. Post-war bungalows in Scarborough and Etobicoke are usually poured concrete, where the typical problem is a vertical shrinkage crack that leaks every spring. Newer rebuilds have modern poured walls, but on lots that were dug and backfilled, settlement can open cracks within the first few years. The clay soil across most of the city holds water against the wall, which makes all three worse.
We look from inside and outside before recommending anything. Isolated cracks in poured concrete are injected from inside with a flexible material that bonds to the concrete and moves with it. Where water is coming through many joints or the wall itself, the fix is from outside: excavate, clean the wall, apply a waterproofing membrane and drainage board, and correct the grading and downspouts so water is carried away instead of held against the house. On stone foundations, that often includes repointing the joints first.
Look at the foundation when you see water or efflorescence on the basement wall, a crack you can slide a coin into, a crack that's wider at the top than the bottom, a door that has started to stick, or a wet corner that appears every thaw. Sooner is cheaper: a crack injection is a small job, a wall that's been wet for ten years is not.
Most hairline and vertical cracks in poured concrete are shrinkage, not structural, and the concern is water, not collapse. Horizontal cracks, stair-step cracks in block, or a wall that's bowing inward are different and need a look right away. We'll tell you which you have.
Single cracks in poured concrete can usually be injected from inside with no excavation. When the whole wall is letting water in, or it's stone or block, the durable fix is from outside. We recommend the smaller job when it will actually hold.
Yes — that's the point of doing both. We trace the water from where it shows up to where it entered, and quote the repair that stops it, whether that's on the roof, the wall, or the grading in between.
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