Spring is when rodent activity peaks. Mice and rats look for warm, undisturbed spaces to nest — and a loft full of soft mineral wool insulation is exactly what they're looking for. Once established, they can shred through insulation, contaminate it with waste, and cause significant damage to cables and timber. In a city with as many closely built terraces and semis as Bristol, a gap in one roofline can matter to the neighbours as well.
Effective rodent proofing involves identifying and sealing the entry points rodents use to access the roof void — typically gaps around fascia boards, soffits, and where services enter the building. It's not just about blocking holes; it's about understanding how mice and rats navigate structures. Proofing is usually combined with removing contaminated insulation and replacing it where necessary. Dealing with entry points before nesting season is in full swing is easier than dealing with an established infestation later.