Pin Holes (Grout)

Floor Detective® Claims and Conditions Guide

Summary

Pin holes in grout joints are small surface voids that develop when air, excess water, or incomplete compaction prevents grout from consolidating fully within the joint. These openings typically form during placement or early curing as entrained air escapes or surface paste collapses. Pin holes are commonly cosmetic in nature but may indicate conditions related to grout mixing, placement technique, or cleanup practices. Evaluation focuses on

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