The level of any wood boring insect infestation will depend on the type of wood, level of sapwood content, whether the timber is fast or slow grown, timber size, location and moisture content. Untreated wood may be considered vulnerable to infestation at greater than 18% wood moisture content. In Scotland, the main wood-boring insect in buildings is the common furniture beetle (Anobium Punctatum) followed by the wood-weevil.
Common Furniture Beetle Treatment:
This is usually the covering of the exposed timber surfaces with insecticide fluid which then brings the infestation under control. In some cases, just keeping the moisture content of timbers below 11% moisture content (full central heating) may control in mid-floor timbers of a well-maintained building.
Other Common Woodborers in the UK.
- Wood weevil (damp timber only)
- Lyctus powederpost beetle
- Ptilinus beetle
- Bark borer beetle
- Deathwatch beetle
- House Longhorn (south-east England).
The common furniture beetles mating period is May to August when the larva pupates into a beetle and exits the timber and mate. The female then lays eggs on uncoated wood. Due to its life cycle in the larval stage, it can take up to 3 years for the infestation to come under control.
The standard envelope treatment process is mainly affective at beetle exit stage or egg-laying, in its larval stage, it can be affected if it tunnels the treated surface. After this, is the period when testing can be carried out to make an accurate statement on possible activity. Where there is no record of treatment, it is possible to comment there is an indication of activity due to site observations.