Hi,
About a year ago we had the loft treated for woodworm (yes, I know I should have done it myself). It was a reputable, recommended company who used a 'boron' product. We've recently noticed that there are some fresh signs ('frass') of woodworm in parts of the treated area.
The company have said that this is 'normal', as the lifetime of the larvae is up to 3 years. I gather there will be new frass until all the larva have gone after 3 years(-ish).
Is this correct? I plan to apply some additional treatment to the affected areas (though the company said this wasn't unnecssary).
Your views much appreciated.
Cheers
Steve