✋ Keep out pests with physics

Physics then chemistry.

  • This applies to many aspects of building science, but today I’m focusing on pests.

Why it matters: The next month is the ideal time to make sure your house is ready to resist the pests seeking refuge when it gets colder.

⚙️ How it works: Using physics means we are using the right physical barrier.

  • Chemistry means we’re relying on a chemical barrier like sprays and repellents — this includes foam and caulk.

👉 A rat needs a 1” hole or a 1/2” gap.

👉 A mouse can squeeze through a hole the size of your pointer finger.

👉 A roach needs a gap the thickness of a penny.

📝 What to do next: Walk around the house and look at all the holes, cracks and crevices.

  • Inspect every place a pipe or line goes into the house – HVAC, plumbing, electrical and internet.
  • Close every gap and hole.
  • Use metal – flat metal or tight mesh – where you can.
  • If you find areas where animals have been chewing (usually squirrels), they’ll be back. Prioritize those areas.
  • After you’ve done as much as you can physically, you can finish with caulk or spray foam.

✅ For your Smart Homeowner list

  • If you need help, lean on my friends at SafeHaven. They’ll do an annual free inspection, so you know you’re protected.
  • Call 214-340-6969 or schedule online at www.SafeHavenPest.com.



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