How often should you replace weatherstripping?
Updated July 2026
Worn door and window weatherstripping needs replacing every 2 to 5 years, with a quick check every fall to catch the pieces that are due. Cheap self-stick foam tape sits at the short end of that range; molded EPDM, silicone bulb, and metal V-strip sit at the long end. It matters because compressed, cracked, or peeling stripping lets heated and cooled air escape around the frame, and those gaps can add 10 to 15% to a home's heating and cooling bill.
What changes the interval
| Your situation | Interval | Why |
|---|---|---|
| Self-stick foam tape | Every 1–3 years | Cheapest option, but it compresses flat and loses its stick |
| Molded EPDM or silicone bulb | Every 4–6 years | Rubber keeps its spring far longer than foam |
| Metal V-strip (tension seal) | Every 8–10 years | Springy metal outlasts almost everything but can bend |
| Door sweep at the threshold | Every 2–4 years | It drags on the floor and wears at the contact edge |
| Garage-side entry door | Every 2–3 years | Big temperature swings age the seal faster |
| Storm-door and window sash seals | Check every fall | Sun-facing sides dry out and crack first |
The cost of skipping it
What skipping it costs: a failed seal is invisible until you feel the draft, but it runs the furnace and AC longer all season. Sealing the leaks around doors and windows is one of the cheapest energy fixes there is: a roll of foam tape is $5 to $12, a quality door sweep $10 to $25, and a whole-house refresh rarely tops $60 in materials against heating and cooling savings that can reach $100 to $200 a year. Ignore it and you also invite condensation, dust, and bugs at the gaps.
How to do it (A weekend afternoon · DIY, utility knife and a screwdriver)
- Go around each exterior door and window on a windy day and feel for drafts, or slide a dollar bill into the closed gap.
- Peel or unscrew the old stripping and scrape the frame clean of adhesive residue.
- Measure each run and buy the matching profile (V-strip, bulb, or foam) plus a fresh door sweep.
- Cut to length and press or screw the new stripping into place, keeping the corners tight.
- Close the door or sash and confirm even contact with no daylight showing through.
Knowing the interval is the easy half. OnOtto reminds you at the right interval, and it won't let you snooze it into next year. Tasks persist until they're done, and completing weatherstripping replacements schedules the next one automatically.
Put this on autopilot, free for 30 daysFrequently asked questions
How do I test whether my weatherstripping still seals?
Two quick checks. Close a door or window on a dollar bill, and if it slides out with no drag the seal is not making contact. On a bright day, turn off the lights inside and look for daylight around the frame. On a windy or cold day, run the back of your hand around the perimeter and feel for a draft. Any one of these on a given opening means that piece of stripping has flattened or cracked and is due for replacement.
Which type of weatherstripping lasts the longest?
Metal tension strips (V-strip) and molded silicone or EPDM bulb seals far outlast self-adhesive foam. Foam tape is quickest to install and cheapest, but it compresses and peels within 1 to 3 years. V-strip can go 8 to 10 years, and a good bulb seal 4 to 6. The tradeoff is install effort: foam is peel-and-stick, while V-strip and door sweeps usually need cutting and a few screws.
Can bad weatherstripping really raise my energy bill that much?
Yes. Air leaking around doors and windows makes your furnace and air conditioner run longer to hold the same temperature, and the gaps add up: a poorly sealed exterior door can leak as much air over a season as a small window left cracked open. Sealing them is one of the highest-return jobs in the house because the material costs so little. Pair it with fresh caulk outside for the full effect; see how often to recaulk exterior.
Is replacing weatherstripping a DIY job?
Almost always. The tools are a utility knife, a tape measure, and a screwdriver, and the hardest part is matching the profile to what came off. Take the old piece to the store to compare. Adhesive foam presses on in minutes, while V-strip and door sweeps take a little cutting and a few screws. For a step-by-step on a door, see how to replace door weatherstripping.