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Roll-Core Crush / Pile Reversal (Carpet)

Floor Detective® Claims and Conditions Guide

Summary

Roll-core crush, sometimes referred to as a tube line, is an appearance condition that develops near the beginning of a carpet roll when pile yarns are tightly wrapped and compressed around the roll core during packaging, storage, and transport. The compressed pile may bend opposite its normal lay direction, creating a visible light or dark band extending across the carpet width when the material is unrolled and exposed to directional lighting. The appearance change results from altered pile orientation and surface reflectance rather than true color change, fiber damage, backing failure, or structural breakdown. Visibility may increase under directional or low-angle lighting and may reverse when viewed from opposite directions. See also Shading, Pile Reversal, and Carpet Problems for broader context.

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