Kingston · Ontario
Foundation crack injection in Kingston
For a single leaking crack in a poured concrete wall, injection is usually the right first repair: done from inside, done in hours, and a fraction of the cost of excavation. Here's how it works and when it's — and isn't — enough.
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Polyurethane or epoxy?
Polyurethane injection
Expands and stays flexible — ideal for leaking cracks, because it moves with Kingston's freeze-thaw cycles instead of re-cracking beside a rigid repair. The default choice for waterproofing.
Epoxy injection
Cures rigid and structural — the choice when the crack affects strength, not just water. Often paired with an assessment of why the crack formed, since epoxy fixes the crack, not the cause.
Rod-hole leaks (small round drips in mid-century poured walls) are their own quick fix — usually the cheapest item on any quote.
When injection is enough — and when it isn't
- Enough: one or two vertical/diagonal cracks in a poured wall, leaking during rain or melt, walls otherwise straight and sound. Typically $400–$900 per crack, done in a visit.
- Probably not enough: water at the floor-wall joint around much of the basement (that's hydrostatic pressure — see waterproofing), horizontal or stair-step cracking in block walls, or any bowing. Injecting those masks a structural signal.
- Not injectable: block and rubble foundations generally can't be injected the way poured walls can — different repairs apply, which is exactly what an on-site assessment determines.
Why DIY kits disappoint in Kingston
Surface-sealing a crack with hydraulic cement traps water inside the wall, where winter freeze-thaw expands it and pops the patch — usually by the second spring. Professional injection fills the crack full-depth to the exterior soil face, which is the part the kit can't reach.
Get a local assessment
Tell us what you're seeing. A vetted foundation repair professional serving Kingston will follow up — usually within one business day.
During spring melt season demand runs high; the earlier you send your request, the better.