Katy Floors & Epoxy

Types of Concrete Cracks — What They Tell You About Your Home

Not all concrete cracks are equal. The type determines the right repair approach and urgency.

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Hairline Cracks

Under one eighth inch wide, usually from normal shrinkage during curing. Typically cosmetic but should be sealed to prevent water infiltration over time.

Diagonal Cracks

From the corners of windows and doors, diagonal cracks typically indicate differential settlement. Moderate-width diagonal cracks warrant monitoring.

Horizontal Cracks

In foundation walls, horizontal cracks indicate lateral soil or water pressure. These are among the most serious crack types requiring immediate structural evaluation.

Stair-Step Cracks in Brick or Block

Follow the mortar joints indicating foundation movement or settlement. The direction and pattern provide clues about the underlying cause.

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