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Concrete cracking causes

Sooner Exterior Home Services

Close-up of a crack running across a concrete sidewalk slab
A crack running through a concrete slab. Photo: Zoshua Colah / Unsplash

Concrete cracks because it shrinks as it cures, because the subgrade moves, or because it was not reinforced or jointed properly. Shrinkage cracking in the first year is normal.

Oklahoma summer pours cure too fast and crack – early morning pours and proper curing compound matter more here than the mix specification. Reinforcement is where cheap quotes get cheap, and you cannot see it afterwards. Ask specifically what is going in and at what spacing.

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Written by Jaylan Jones. Sooner Exterior Home Services earns a referral fee when a call connects to a contractor. See our business-model disclosure.