Decisions

DIY or call a licensed pro?

The desk sells nothing, so it can afford the honest version: a good share of house pest problems are homeowner work, done well with patience and the right method — and a short list of them are professional work from the first day, where DIY does not save money but spends it slowly while the problem grows.

DIY handles these well

• Occasional invaders — the odd spider, a few silverfish, a pantry moth traced to one bag of seed: vacuum, clean out, seal, monitor.
• Overwintering invaders, handled in season — exclusion in September and October, vacuuming strays all winter.
• House mice, caught early — exclusion plus snap traps on established runs, checked daily, with numbers recorded.
• Sugar-ant trails — bait placed and left alone, competing food removed, entry points caulked.
• A small paper wasp nest away from doorways — or better, left alone until frost kills it.
• Prevention itself — every page of the room-by-room walk is homeowner work by design.

Where DIY fails — call a pro

• German cockroaches. Resistance, harborages inside appliances, and adjoining units defeat the home arsenal; spray makes it worse. See the plate.
• Bed bugs. Bombs scatter them; partial treatment breeds a harder, hidden population. Professional inspection, preparation, and follow-through decide the outcome.
• Termites. The treatment is structural, regulated, and needs equipment and product access a homeowner does not have — plus a damage assessment in writing.
• Wasps or hornets in a wall. The failure mode — wasps driven into the living space — is worse than the problem. Void work is professional work.
• Rats. Burrows, sewers, and bait risk to pets and children put this beyond a weekend project.
• Anything involving bats or wildlife in the attic. Legal protections, disease questions, and exclusion timing all apply.
• Anything you cannot identify. Treatment without identification is the single commonest waste of money the desk records. Identify first — the Field Key is free.

Safety rules that govern everything

• Keep children and pets away from treated surfaces until they are dry and the label's interval has passed; store products locked, in original containers, never in food or drink bottles.
• Never mix products, never combine a spray program with a bait program on the same surfaces, and never use outdoor products indoors.
• Mothballs are a labeled pesticide, not a household freshener; use them only exactly as the label directs, in sealed spaces.
• Old product is disposed of as the label and local household-hazardous-waste rules direct — not down a drain, and not into the lake's watershed by way of a storm grate.