Mice, rats and wasps: what actually works

Exclusion first, always

Pest control sells removal, but removal without exclusion is a subscription. The animals you evict are replaced by relatives using the same doorway. So the first move for mice and rats is not a trap; it is a slow walk around the outside of the house at knee height, pencil in hand, finding every gap the building has grown. The same envelope that keeps rain out keeps wildlife out, which is why this walk pairs naturally with the checks in the outside survival guide.

Seal small holes with wire wool packed tight and finished with sealant; rodents gnaw through filler alone but not through steel. Mind the exceptions: airbricks are ventilation and must breathe (proof them with fine mesh, never blockwork), and anything that might house bats gets checked before sealing, because bats and their roosts are legally protected.

Mice, rats and the drain question

Mice want warmth and crumbs: sealed food containers, swept floors and a fortnight of snap traps along walls (droppings mark the motorways) usually ends a small invasion. Rats are a different tier. A rat indoors very often means a broken drain, an uncapped pipe or a gap in the drainage run, because that is their transport network; before paying for bait, have the outside drains checked. Poison is the last resort, not the first: it kills slowly, it reaches pets and owls further up the food chain, and a poisoned rodent expiring under your floorboards is a smell with a six-week career.

Wasps, and the bees exception

A wasp nest in April is the size of a golf ball with one queen aboard; by August it can hold thousands and the workforce defends it with enthusiasm. Early, small and reachable without a ladder is the only window where a shop treatment is even arguable, and never for anyone with a sting allergy nearby. A full-size nest, anything in a loft, wall cavity or high eaves, is professional work with proper kit, full stop. Wasps do not reuse old nests, so a dead autumn nest can be left to become a curiosity.

Bees get the opposite treatment. Honeybee swarms are usually collected free by a local beekeeping association, bumblebee nests retire by themselves at the end of summer, and no bee should ever meet an insecticide. If a colony is somewhere structural (a chimney, a cavity), specialist relocation exists; killing them is both a waste and, with honey left in a wall, the start of a stickier problem.

The rhythm matters more than the heroics: proof in early autumn before mice commute indoors, glance at eaves in late spring while nests are still small, and fold the walk-round into the autumn checklist so it happens without willpower. A maintenance calendar that remembers for you is the difference between a sealed house and a surprised one.