Stop Drafts Around Doors and Windows for Cheap: 7 Fixes

TL;DR: Most drafts come from gaps under doors and around window sashes, and both can be sealed for under $20 total using weatherstripping tape, a door sweep, and caulk. The Department of Energy estimates air leaks around doors and windows waste 10-20% of a home's heating and cooling costs, but sealing them yourself usually takes less than an hour per opening.

_Last reviewed: July 2026 · 6 min read_

Your heating bill went up again and you can feel cold air sneaking in somewhere near the front door. You don't need a contractor or new windows to fix this. A few cheap materials from any hardware store will handle 90% of drafts in an older home.

Okoniq Property Hub logs which doors and windows you've weatherproofed and when, so you're not guessing next winter whether that back door already got sealed.

Where do most drafts actually come from?

Drafts come from three spots: the gap under the door, the seam where the door meets the frame, and the spot where window sashes meet the frame or sill. On older homes, especially anything built before 1990, these gaps widen over time as wood shrinks and old weatherstripping cracks.

A simple test works better than guessing. On a windy day, hold a lit candle or a piece of tissue paper near the edges of your doors and windows. If the flame flickers or the tissue moves, air is getting through. Do this test around every exterior door and every window before you spend a dime on materials, because sealing the wrong spot wastes both money and time.

Old wiring and outdated electrical panels aren't related to drafts, but if you're already doing a walk-through of an older home for maintenance issues, it's worth checking for other aging systems while you're at it, like whether you still have knob-and-tube wiring tucked behind those same walls.

What's the cheapest way to seal a drafty door?

A door sweep and self-adhesive foam weatherstripping will fix most drafty doors for around $15 total. The sweep attaches to the bottom of the door and blocks the gap between the door and the threshold, usually the single biggest source of heat loss on any exterior door.

Buy a vinyl or aluminum door sweep for $6 to $10, cut it to width with a hacksaw, and screw it into the bottom of the door. For the sides and top, press-and-stick foam tape (about $4 for 17 feet) into the door jamb where the door closes against it. Close the door slowly to check the tape compresses evenly. If light still shows through anywhere, add a second layer of tape in that spot.

For a more durable option, V-strip weatherstripping (also called tension seal) costs about $8 and lasts 5-10 years compared to 1-2 years for basic foam tape. It's a bit fussier to install because you have to cut it at an angle at the corners, but it holds up much better in doors that get used dozens of times a day.

How do you stop drafts around windows without replacing them?

Rope caulk and plastic window film seal drafty windows for under $10 per window and take about 15 minutes each. Rope caulk is a puttylike cord you press into the gap between the sash and frame by hand, no tools needed, and it peels off cleanly in spring.

For windows that leak air around the whole frame rather than just the sash, exterior caulk (about $5 a tube) seals the gap where the window frame meets the siding. Use a caulk gun to run a bead along any visible seam, then smooth it with a wet finger. This is a permanent fix and works well on double-hung windows that are original to the house.

Shrink film kits (around $15 for a 5-window kit) create an extra clear layer over the entire window using double-sided tape and a hair dryer to shrink the plastic tight. This is the cheapest fix per square foot of glass and can drop heat loss through a single-pane window noticeably, though it does mean you can't open that window until spring.

| Fix | Cost | Best For | Lasts | |---|---|---|---| | Foam weatherstripping tape | $4-6 | Door jambs, quick fix | 1-2 years | | V-strip weatherstripping | $8-12 | Doors, heavy use | 5-10 years | | Rope caulk | $6-10 | Window sashes | 1 season | | Shrink film kit | $15 (5 windows) | Single-pane windows | 1 season |

Are outlets and switch plates on exterior walls a hidden draft source?

Yes, outlets and light switches on exterior walls leak air through the gap around the electrical box, and foam gasket kits fix this for about $5 for a pack of 10. Pull off the switch plate cover, slide a precut foam gasket over the outlet or switch, and screw the cover back on. It takes under a minute per outlet and most homes have 8 to 15 exterior-wall outlets worth doing.

This fix gets skipped constantly because it's invisible once the cover is back on, but electrical boxes are a bigger draft source than people expect since they're cut directly into the wall cavity. If you're already checking outlets, it's a good moment to glance at whether any are still the old 2-prong style that may need updating for safety reasons unrelated to drafts.

Should you seal the attic hatch and other overlooked gaps too?

Yes, attic hatches, recessed lighting, and the gap around exterior faucets leak as much air as a cracked window and get missed constantly. Weatherstrip the attic access hatch the same way you would a door, using foam tape around the frame, and add a layer of rigid foam insulation on top of the hatch itself for about $10.

Exterior hose bibs and where cable or gas lines enter the house are also common leak points. A $4 tube of expanding foam sealant handles these small gaps in under 10 minutes. If your attic ventilation setup is older, it's also worth checking whether your attic ventilation is failing your roof, since poor airflow up there can compound both moisture and energy problems beyond just drafts.

FAQ

How much money can sealing drafts actually save?

The Department of Energy estimates sealing air leaks can cut heating and cooling costs by 10-20% annually, which on a typical $2,000 yearly energy bill works out to $200-$400 saved.

Do storm doors and storm windows help with drafts?

Yes, a storm door or storm window adds a second air barrier and can reduce heat loss through that opening by 25-50%, though the upfront cost ($150-$400 installed) is higher than the tape-and-caulk fixes above.

How often does weatherstripping need to be replaced?

Basic foam tape lasts 1-2 years before it compresses flat and stops sealing, while V-strip and rubber gasket weatherstripping typically lasts 5-10 years depending on how often the door is used.

Can you fix a drafty door without removing it from the hinges?

Yes, nearly every fix in this guide, sweeps, tape, V-strip, is installed with the door still on its hinges using just a screwdriver, hacksaw, and scissors.

Is it worth caulking windows that will eventually be replaced?

Yes, even if a window replacement is a few years out, a $5 tube of caulk or rope caulk pays for itself in one winter and takes 15 minutes, so there's no reason to leave a known leak unsealed in the meantime.

This is educational information, not contractor or engineering advice. Call a licensed contractor if you notice rot, structural gaps, or drafts that persist after sealing, since those can point to a bigger issue with the door or window frame itself.