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Foundation Crack Repair & Bowing Walls

Leaking wall cracks, horizontal cracks and bowing basement walls: what they mean, how they are repaired and what it costs.

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Not every foundation crack is a crisis, but every crack should be understood. Thin vertical cracks in poured-concrete walls are common shrinkage cracks and are usually fixed by injection if they leak. Horizontal cracks, stair-step cracks in block walls and walls that lean inward point to soil pressure and should be inspected soon.

Repair methods

Polyurethane or epoxy injection

Seals leaking cracks in poured walls from the inside. Epoxy also restores structural strength.

Carbon-fiber straps

Low-profile reinforcement that stops walls with minor bowing from moving further.

Wall anchors and steel braces

For walls that have moved more, anchors are set in the soil outside and connected through the wall, or steel beams brace the wall from floor to joists.

Typical costs

ProjectTypical range*
Crack injection (per crack)$300 – $1,000
Carbon-fiber straps (per strap)$500 – $1,000
Wall anchors or steel braces (per wall)$4,000 – $12,000

*General US ranges for orientation only.

Related guides

FAQ

Common questions

Which cracks are serious?

Horizontal cracks, cracks wider than about 1/4 inch, stair-step cracks in block walls and any wall that leans inward should be inspected by a professional soon.

Will my wall keep moving?

Walls pushed by saturated soil usually keep moving slowly. Stabilizing early is much cheaper than rebuilding a wall later.

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