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FOUNDATION FIXERS
§ 02.H · Concrete Repair

Concrete Crack Repair — Phoenix.

Cracks are how concrete tells you something moved. We repair the crack and address what caused it — so the repair holds and the crack does not come back.

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Stair-step diagonal crack in painted drywall — classic concrete movement signature
Stair-step crack · diagnostic shape

Cracks are diagnostic. The shape, location, width, and movement of a crack tell us what is happening underneath. We fix cracks, but we also figure out what caused them — because patching without addressing the cause means the same patch fails on the same crack a year later.

Crack types we repair most

  • Foundation stem-wall and slab cracks — vertical or stair-step cracks indicating settlement
  • Driveway and garage floor cracks — usually settlement or shrinkage of the underlying soil
  • Pool deck and patio cracks — voids forming under the slab from water and erosion
  • Stucco and block exterior cracks — typically follow foundation movement
  • Interior drywall cracks — diagonal cracks above doorframes, gaps where wall meets ceiling
  • Sidewalk and walkway cracks — control joints that have failed or settlement offsets

Our two-step approach

  1. Address the cause. If there is a void under the slab, we fill it with foam. If the slab needs leveling, we lift it. For more complex structural cases we coordinate additional support as part of the repair. The crack closes as much as it can during stabilization.
  2. Repair the crack. Once the slab is stable, we repair the crack with the right material — epoxy for tight structural cracks, polyurea or polyurethane sealants for cracks that may flex slightly, surface coatings or color-matched patches where appearance matters.

Materials we use

Epoxy injection

For stable, structural cracks. The epoxy bonds the two sides of the crack mechanically — done right, the slab is actually stronger at the crack than before. Best for foundation walls, slab cracks where movement has stopped, and structural elements.

Polyurea / polyurethane sealants

For active or slightly mobile cracks (control joints, tilt-up panel joints, slabs that flex slightly with temperature). These sealants stay flexible long-term and resist water intrusion.

Surface patching and color matching

For cosmetic finish work. We blend the patch with surrounding texture, color match where the concrete is exposed, and ensure the repair is durable to weather and traffic.

What crack repair costs

Standalone crack repair (slab is already stable) typically runs $300–$1,500 depending on length and type of crack. Combined with leveling or stabilization, crack repair is usually a small add-on to the larger project.

FAQ

Crack repair — common questions

When is a concrete crack a real problem vs. just cosmetic?
Hairline cracks under 1/16" in shrinkage patterns are usually cosmetic. Cracks that are growing, have vertical offset between sides, run in a stair-step pattern, or are wider than 1/8" are likely structural and worth repairing properly.
Will the crack come back after you fix it?
If we only patch the crack and the underlying movement continues, yes. Our approach is to stabilize the slab first — typically with foam injection to fill voids and lift the slab back to grade — then repair the crack. That way the repair holds.
What materials do you use for crack repair?
It depends on the crack. For tight, structural cracks we use epoxy injection. For active cracks that may continue to move slightly, we use polyurea or polyurethane sealants that flex with the slab. We choose based on what the crack is doing, not what is easy.
Can you make the crack invisible?
We can make most cracks much less visible — color-matched, troweled smooth, surface-coated where appropriate. On exposed exterior concrete the patch is always somewhat visible up close, but from a normal viewing distance it disappears.
§ Next Step

Fix the crack and the cause.

Free, on-site assessment. We tell you what is structural, what is cosmetic, and what each costs.

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