How to Install Weatherstripping on an Exterior Door

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With the push to save on energy costs, weatherstripping is one of the easiest ways to prevent drafts and to hold your heating and air conditioning in your house. A 1/8-inch gap between an exterior door and your wall is, overall, the same as having a hole in your wall that is at least six inches square.

Things You'll Need

  • Utility knife
  • Hammer
  • Tape measure
  • Screwdrivers (Phillips and/or flat head to fit screws)
  • Screws
  • Tin snips/side cutters
  • Self-adhesive foam weatherstripping
  • Door sweep
  • Soapy water and rag

Instructions

  • Clean the door stop molding with soapy water and let it completely dry.

  • Measure your door molding with the tape measure. Using the utility knife, cut the self-adhesive foam strips to fit the molding at the top and sides of the door.

  • With the door open, peel the back from the foam and press it to the molding. For the larger side pieces, it may be easier to remove portions of the backing and press the the exposed section to the molding. Work your way down removing parts of the backing and then pressing until you have the entire piece attached.

  • Cut the door sweep to fit the width of your door using the tin snips on the metal portion of the sweep and either finishing the cut with the snips or a utility knife on the rubber section.

  • Close the door and begin screwing in the sweep. The rubber portion should be low enough that it makes contact with the floor but does not rub it.

Tips & Warnings

  • If you are weatherstripping your door, to save more on your heating and cooling costs, you may want to consider consider weatherstripping your windows as well.

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