How to Weather-Strip a Door
Stop drafts, cut energy bills, and keep bugs out by replacing worn weatherstripping on your exterior doors. This beginner project takes 30 minutes and costs under $30.
Repair & Refinish Team
Published March 7, 2026 · Updated March 20, 2026
What You'll Need
- Putty knife or flat-head screwdriver
- Utility knife
- Measuring tape
- Scissors
- Hammer and small nails (if needed)
- Drill/driver (for door sweep)
- Self-adhesive foam or rubber weatherstrip tape
- Door sweep (for bottom of door)
- Rubbing alcohol or cleaner (for surface prep)
- Threshold seal (if needed)
Cost Estimate
Budget
$10
Mid-Range
$20
Premium
$30
A handyman charges $75-$150 to replace door weatherstripping. DIY materials cost $10-$30.
Step-by-Step Instructions
Inspect and Remove Old Weatherstripping
Step 1 of 6Open the door and examine the existing weatherstripping around the door frame (jamb) and the bottom of the door. Peel or pry off the old material. Remove any residual adhesive with rubbing alcohol or adhesive remover. For nailed-on weatherstripping, pry it off with a putty knife. Clean the entire surface where new weatherstripping will be applied — adhesive won't stick to dirty or greasy surfaces.
Do the light test first: close the door on a sunny day and look for daylight around all four edges. Focus your weatherstripping on the gaps where light is visible.
Measure and Cut New Weatherstripping
Step 2 of 6Measure the top and both sides of the door frame where the weatherstripping will go. Cut the self-adhesive weatherstrip to length — cut it slightly longer (1/2 inch) and trim to perfect fit during installation. For V-strip weatherstripping, you'll apply it to the door stop (the raised strip the door closes against) so it compresses when the door shuts.
Apply Weatherstripping to the Frame
Step 3 of 6Start with the top of the frame. Peel back a few inches of the adhesive backing and press the weatherstrip into position against the door stop. Close the door periodically to check compression — the weatherstrip should compress slightly when the door is closed, creating a tight seal without making the door hard to close. Continue with both side jambs, working from top to bottom.
Apply weatherstripping on a warm day (or warm the frame with a hair dryer). Adhesive bonds much better to warm surfaces than cold ones.
Install the Door Sweep
Step 4 of 6Close the door and measure the gap at the bottom between the door and the threshold. Choose a door sweep that bridges this gap. Hold the sweep against the inside face of the door so the rubber flap just touches the threshold. Mark the screw holes, drill pilot holes, and screw the sweep in place. The flap should brush the threshold when the door closes but not drag so hard it prevents closing.
An adjustable door sweep lets you fine-tune the height over time. Floors settle and thresholds wear — an adjustable sweep compensates without replacement.
Check the Threshold Seal
Step 5 of 6Examine the threshold (the metal or wood strip at the bottom of the door frame on the floor). If the rubber insert in the threshold is cracked or compressed flat, water and air can seep under the door even with a new sweep. Most threshold seals are replaceable — slide out the old rubber insert and push in a new one (available at hardware stores in standard widths).
Test the Complete Seal
Step 6 of 6Close the door and check for drafts by holding a lit candle or incense stick around all four edges. The flame or smoke should remain steady — any flickering indicates remaining air leaks. Do the light test again and verify no daylight is visible. Check that the door opens and closes smoothly without excessive force. Adjust weatherstrip position or trim excess if the door sticks.
Recommended Products
Complete door kit with kerf-in compression weatherstripping for both sides and top, plus adjustable door sweep. Premium EPDM rubber lasts 10+ years.
Self-adhesive closed-cell rubber foam tape. Easy to apply, good compression recovery. Two rolls cover one standard door.
Heavy-duty aluminum and rubber door sweep. Slotted holes allow height adjustment. Seals gaps up to 1 inch. Fits standard doors.
Affiliate Disclosure: We earn a small commission when you buy through our links at no extra cost to you.
Tips & Warnings
- Replace weatherstripping on all exterior doors at the same time — it's faster to buy materials in bulk and the sealing benefit is cumulative.
- Foam tape is the cheapest option but compresses permanently within 1-2 years. Rubber or silicone weatherstripping lasts 5-8 years and maintains its shape.
- Don't forget the door from the garage to the house — it's an exterior door for insulation purposes.
- For sliding glass doors, use a fin-style weatherstrip that fits in the track groove.
- Do not add so much weatherstripping that the door becomes hard to latch. The lock should engage without forcing the door shut.
- If your door has a large gap on one side (more than 1/4 inch), the door or frame may be warped. Weatherstripping alone won't fix it — the door may need adjustment or replacement.
Frequently Asked Questions
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