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Pest prevention: 12 ways to keep bugs and rodents out of your home

By the FixedPad team · Updated

Short answer: Most pest problems come down to three things: food, water, and a way in. Seal gaps around doors, windows, and pipes; fix leaks and reduce moisture; store food and trash in sealed containers; and keep plants, firewood, and mulch away from your foundation. Call a pro when you see droppings, nests, or termite signs.

Seal the way in

  1. Caulk gaps around windows, doors, and where pipes and wires enter the house.
  2. Install door sweeps and replace worn weatherstripping.
  3. Repair torn screens on windows, doors, and attic and crawl space vents.
  4. Cap chimneys and seal gaps in rooflines and soffits, which are common entry points for squirrels, bats, and birds.

Remove water

  1. Fix leaky faucets and pipes, especially under sinks.
  2. Run a dehumidifier in damp basements and crawl spaces.
  3. Clean gutters and make sure downspouts drain away from the foundation.

Remove food

  1. Store food in sealed containers, including pet food and birdseed.
  2. Take out trash regularly and use bins with tight lids.
  3. Wipe up crumbs and spills and don’t leave dishes out overnight.

Fix the yard

  1. Keep a gap between landscaping and the house. Trim shrubs and branches back from walls and the roof, and keep mulch a few inches from the foundation.
  2. Store firewood off the ground and at least 20 feet from the house.

When to call a professional

  • Droppings, gnaw marks, or scratching in walls or the ceiling
  • Signs of termites or carpenter ants
  • Bed bugs, which are very hard to eliminate without professional treatment
  • Stinging insect nests near doors or play areas
  • Wildlife in the attic or chimney

A pest pro can identify the species, find how pests are getting in, and recommend a one-time treatment or a prevention plan.

This guide is general information only. Codes, permits, and licensing rules vary by location; for safety-related work, consult a licensed professional.

Common questions

How small a hole can a mouse fit through?

A mouse can squeeze through a gap about the size of a dime (roughly 1/4 inch). Seal gaps with steel wool and caulk or hardware cloth; rodents chew through foam and plastic.

Are DIY pest sprays effective?

They can knock down visible insects but often miss the colony or nest. For recurring problems, a professional can find the source and use targeted treatments.

What are signs of termites?

Mud tubes on foundation walls, discarded wings near windows, hollow-sounding wood, and small piles of droppings that look like sawdust or pellets.