Foundation crack repair & waterproofing, Ottawa

Interior polyurethane or epoxy injection for a single crack starts from $450. If water is tracking in from outside and the fix needs excavation, membrane and backfill, that's a bigger job — typically $2,000–$3,500 depending on depth and access. We diagnose which one your crack needs before quoting either.

Thin vertical hairline cracks are usually just shrinkage and low-risk. Horizontal cracks, diagonal or stair-step cracks, ones wider than a dime, or ones where the wall bulges or the crack keeps growing, are signs of real movement and worth a proper assessment — sometimes by a structural engineer, not just a contractor.

Often, yes — if the job actually includes excavation, membrane and backfill. A full exterior crack repair with those steps typically runs $2,000–$3,000 in Ottawa. A rock-bottom quote is worth a direct question: does the price include digging down to the footing, or just surface patching that fails again?

Often, yes. Interior injection — polyurethane or epoxy pumped directly into the crack from inside the basement — seals most active leaks without excavation, from $450. We only recommend exterior excavation when the crack is tied to a drainage or membrane failure that interior injection can't reach.

If the crack is the only source and it's injected full wall-thickness, yes. But a wet basement after a thaw is sometimes one crack doing a lot of damage while the real cause is a clogged or failed weeping tile — we check drainage at the same time so you're not back here next spring.