This is one of the more expensive parts of a rodent problem.
People often focus on droppings and noise first, which makes sense. But the property damage can be just as serious. CRRU UK guidance says rodents may cause significant damage to commodities, especially stored food and animal feeds, and to buildings and infrastructure including electrical cables, drains, and sewers.
So yes, wires, insulation, and stored goods are all realistic targets.
Rodents gnaw as part of normal behaviour.
BPCA says rats gnaw on the sheathing around electrical cables, and that this can present a significant fire risk. It also says gnaw damage can affect pipes and other materials.
This is one of the reasons rodent activity should not be treated like a minor nuisance once it is established.
CRRU states that rodents can damage commodities, especially stored food and feed, and that they pose food-safety and hygiene risks because they are attracted to areas where food is stored, prepared, and sold.
BPCA’s mouse guidance also lists damage to stored food in cupboards and pantries as a common sign of mouse activity.
That means damage is not just about chewing. It is also about contamination and loss.
Rodent activity in lofts, voids, and storage areas often overlaps with insulation because those are the same sorts of spaces rodents use for harbourage and nesting.
BPCA-hosted 2026 rodent advice specifically lists shredded nesting materials such as paper, fabric, or insulation as an early sign of infestation.
So if insulation is being disturbed, torn, or worked into nests, that is a useful clue in itself.
This is why rodent problems get expensive.
You may be dealing with:
CRRU and BPCA both support that broader picture of rodents as both contamination pests and property-damage pests.
Commercial sites often take a bigger hit because they have more stock, more storage, stricter hygiene expectations, and more reputational risk.
CRRU says rodent infestations matter across the food industry and that some standards and obligations require active rodent management.
So for businesses, it is not only about the repair bill. It can also affect stock loss, hygiene compliance, and disruption.
If you are already seeing gnaw marks, disturbed insulation, damaged food packaging, or signs of contamination, it is usually better to act before the repair bill grows.
Rodent damage tends to spread the longer activity continues. If you want help working out whether the signs point to active rats or mice, Pest Gone can help you assess the problem and the next sensible step.
