Woodworm Beetle

Woodworm refers to the larvae of the wood-boring beetles of which four species are the most common in Britain. As is usual with beetles, the adults are fairly harmless but the larvae have voratious appetites for - in this case - timber. They leave evidence of their activity as tiny, neat round holes (as if darts had been thrown at the wood). You will usually find small piles of powdery dust around the holes. This is known as 'frass' but it does not confirm that the infestation is current and active as frass can remain undesturbed for decades.

Your Questions Answered

Q.
I recently renovated a building and in the rafters was wood worm, there was fibre glass insulation in between the rafters, if I use the fibre glass in another building would the woodworm be spread into that floor. Many thanks.

They wouldn't lay eggs in the fibre glass but personally I wouldn't risk moving the insulation in case there are any adult beetles lurking in there as they would start infesting again in the new wood.