Concrete Slab Curling and Edge Lift (Concrete / Substrates)

Floor Detective® Claims and Conditions Guide

Summary

Concrete slab curling and edge lift refer to differential elevation changes within a slab panel caused by uneven moisture loss, shrinkage, or temperature variation between the top and bottom of the concrete. Curling commonly occurs when the upper portion of the slab dries and shrinks differently than the lower portion, causing slab edges or corners to lift or change elevation. These elevation differences may influence flooring-system compatibility by creating flatness variation, point loading, joint stress, adhesive bond stress, or localized flooring movement. Flooring symptoms associated with slab curling reflect the interaction between substrate profile, slab movement, flooring-system design, and manufacturer flatness requirements rather than a defect in the flooring material itself. See also Concrete Flatness and Levelness Compatibility, Concrete Shrinkage and Settlement, and Concrete Substrate Problems for broader context.

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