Defeat Drafts

Caulking & weatherstripping gaps in your home will help seal the “thermal envelope” and save money.

By Sealing Up Your House


The outer walls, ceiling, windows, doors and floor make up the “thermal envelope” of your house. Any gaps or holes in this envelope allow the conditioned or heated air inside your house to escape. When you add up all the small gaps, holes, cracks, and leaks, it’s often the equivalent of leaving a couple of windows wide open—all the time.

Finding your draft problems and solving them will pay off on your electricity bill. Winter is the best time to find leaks in your home because you can feel the cold air moving. But in any season, you can find problem areas by running a burning incense stick around windows and doors and watching the smoke.

Materials for the Job

You can easily tighten up your house and save money by using various simple and effective insulating materials such as silicone caulk, spray foam, weatherstripping, and foam pads.

  • 1-2 tubes of silicone caulk: gaps in baseboards and window frames
  • 1-2 cans of expanding spray foam: bigger gaps
  • 1-2 rolls of felt weatherstripping: around doors and windows
  • Pre-cut foam pads: for around electrical sockets

Video: Learn How to Install Weatherstripping

Video: Fill in Gaps and Holes Using Spray Foam and Caulk

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