Weather stripping helps eliminate drafts around an exterior door. After learning how to seal a door, your home should be noticeably more comfortable. Homeowners typically select wrapped foam weather stripping for the top and sides of a door frame. To stop leaks at the bottom of the door, attach a metal door sweep with a vinyl flap. If thick carpeting would block this type of door sweep, we’d suggest you purchase flexible vinyl stripping designed for the door’s threshold.
Prepare a clear work space near your door so that you have room to measure and cut weather stripping.
- All-purpose cleaner
- Paint scraper or putty knife
- Measuring tape
- Sharp scissors
- Hack saw
- Power drill
How to Seal a Door Process
- Check for loose door hinges and tighten screws if necessary.
- Remove old weather stripping with a putty knife or paint scraper.
- Clean the door frame’s edges.
- Scrape out grime lodged in the threshold’s grooves.
- Measure the door frame along the sides and top.
- Keep track of which measurement is for the right and left because they might vary slightly.
- Cut the top piece of foam stripping with sharp scissors.
- Angle the ends because you will be making mitered corners with the side pieces of stripping.
- Tack the top piece in position with 1-1/2 inch nails.
- Keep nails 2 inches away from the ends.
- Cut the side pieces of stripping with angles to meet the angled ends of the top piece.
- The bottom ends of the side stripping should be kept straight.
- Nail the side pieces to the frame.
- Open and close the door to confirm that the stripping is blocking drafts while still allowing the door to latch.
- If necessary, adjust weather stripping to create a continuous air barrier.
If attaching a metal door sweep:
- Measure across the bottom of the inside of your door.
- Cut the door sweep as necessary with a saw to ensure it fits along the bottom of the door.
- Mark the holes where the door sweep screws will go and drill them.
- Attach the door sweep with screws and insert the bottom vinyl flap.
If you had to use a vinyl threshold-mounted door sweep instead:
- Cut it to size.
- Press the door sweep into the threshold grooves.