Holes remain after beetles have gone, so historic evidence can look active for many years. Treatment should follow an assessment of current signs and timber condition.
01
Look for fresh evidence
Clean-edged holes, fresh bore dust and seasonal beetle emergence can support current activity. Dust from vibration or old stored material can mislead, so context matters.
02
Moisture influences risk
Many timber insects favour particular moisture conditions. Leaks, poor sub-floor ventilation and condensation should be corrected alongside any justified treatment.
03
Check structural condition
Even inactive damage may have reduced timber section. Treatment does not restore strength, so heavily affected timbers may need competent repair or structural assessment.
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Dan, Director / Surveyor
Last reviewed: July 2026. Advice is general until the property, access and visible evidence have been assessed.
When to arrange a visit
Book an inspection when the problem is persistent, changing, purchase-related or unclear after basic maintenance checks.