Powder Post Beetle with Frass

Frass

Hole size

Frass

Frass

Void

Decay

Elevated moisture

Elevated Moisture

Powderpost Beetle Infestation (Hardwood Flooring)

Floor Detective® Claims and Conditions Guide

Summary

Powderpost beetle infestation in hardwood flooring is a biological condition involving wood-boring insect activity within the wood material itself. The condition is commonly identified by small round exit holes and fine powder-like residue known as frass. Evidence may become visible months or years after installation when adult insects emerge from concealed internal tunnels formed during larval development. Emergence after installation does not independently establish when infestation originated. Powderpost beetle activity is commonly confused with Termite Damage, natural wood openings, or surface imperfections without proper evaluation. The condition reflects biological interaction within the wood material and is not caused by flooring installation technique or finish application. See also Termite Damage, Wood Decay Hardwood Flooring, and Hardwood Floor Problems for broader context.

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