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Drafty window? Here's what to do first

Weatherstripping and a tube of caulk are the cheapest energy upgrade in the house, and both are genuinely beginner work.

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Safe to DIY

Most homeowners can handle this with basic tools by following the steps below.

Beginner About 60 min

Video: Lowe's Home Improvement (YouTube)

What to do, in order

  1. Step 1: Find the leaks by moving a lit incense stick slowly along the frame on a windy day.
  2. Step 2: Scrape off old caulk and clean the surface.
  3. Step 3: Run a fresh bead of exterior caulk along the outside frame joints.
  4. Step 4: Replace worn door weatherstripping and add a door sweep at the threshold.
  5. Step 5: Re-test with the incense stick to confirm the draft is gone.
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This page also helps with

  • cold air coming in
  • high energy bill
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