Concrete Overlay Questions

If the slab is structurally sound and the cracks are surface-level, an overlay can work. The installer assesses the slab on-site and fills active cracks before applying the overlay. Full replacement is only needed when the base is heaving or the slab has lost structural integrity.

Overlay thickness typically runs between 3/16 inch and 3/8 inch. The installer sets the exact thickness in the written estimate based on how rough or pitted the existing surface is. Going too thin over a rough slab causes uneven wear.

Surface spalling exposes the aggregate beneath, which absorbs water. In Fort Worth’s freeze-thaw cycles, that moisture expands and deepens the damage each season. A small spalled area can double in size within a year, eventually compromising the slab’s structural layer and requiring full replacement.

Light foot traffic is typically possible within 24 hours. Vehicle traffic requires the overlay to reach full cure, which usually takes 48 to 72 hours. The installer confirms the exact timeline based on the overlay product used and ambient temperature at the time of application.

Yes. Once the overlay reaches full cure, it can accept a sealer, acid stain, or a full epoxy or polyaspartic topcoat system. The installer verifies cure before any topcoat is applied, skipping that check is the most common reason topcoats blister or peel.

A standard surface overlay on an existing slab does not typically require a building permit in Fort Worth. If the overlay is part of a larger structural repair or a new construction project, permit requirements may apply. The installer confirms any local requirements during the on-site assessment.