There’s quite a variety of insects which attack organic materials in mostly historic building. The most common ones feeding on wood are furniture beetle, longhorn beetle and death watch beetle. The furniture beetle requires a wood moisture content of more than 10% and is accordingly often found in cool damp places. The longhorn beetle only attacks conifer wood and often sits in roof trusses; it’s exit holes are distinctive, oval in shape and huge with a diameter of up to a centimetre..
Treatment wood ceiling, St. Peter's Church, England