Hi! A few years ago I paid a local company to treat my loft for woodworm while I was renewing the stud walls and some flooring. I have been doing insulation work since ( yes a protracted job!) and still see signs of activity. Rang the chap who did the work and was told that this is normal as the beetles are made infertile, rather than killed. Am I being taken for a pillock!
Thanks in anticipation...