Drafty Windows in a Rental? No-Drill, Peel-Off Fixes That Work
Renting means no drilling and no new windows. Find the leaks, then press removable rope caulk into the gaps. It peels off when winter is over.
By Jamilur Rahman Updated November 5, 2026 · 6 min read
- Time
- 30 min
- Cost
- Under $20
- Difficulty
- Easy
In this guide
Quick answer
Rental windows leak where the sash meets the frame and along old, flattened seals. Find the leaks with a tissue, lock each window and hang heavy curtains. Then press removable rope caulk into the gaps that remain. It is a soft putty that peels off in spring, so you can undo it when you move out and there is nothing to drill or replace.
Free fix vs. permanent fix
Block it with what you already own
- Close and lock every window
- Roll a towel along the sill at night
- Hang heavy curtains and close them at dusk
- Report big gaps or a window that will not shut to your landlord, in writing
How long it lasts: A few weeks. Towels slip and curtains do not seal the gap, so air is slowed but not stopped.
Removable rope caulk in the gaps
Rope caulk is a soft, pliable putty you press into the gap by hand, so it fills the leak instead of covering it. It comes off without tools, which suits a rental. The free steps slow the air down, and the caulk stops it.
What to get: Removable rope caulk weatherstrip
How long it lasts: A whole winter. Peel it off in spring.
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What you'll need
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Incense stick or tissue strip
Shows where air is moving
Free -
Heavy curtains
Close them at dusk
You have it -
Dry rag
Wipe dust out of the gap first
You have it - Our pick Illustration
Removable rope caulk
Measure the gap lengths and buy a little extra
- Illustration
Window insulation film kit
For single-pane glass that stays ice-cold
Why it happens
Worn or flattened seals
The foam or felt strip along a sash goes hard and flat after years of use. It stops touching the glass or frame, and air slips through.
Gaps where the sash meets the frame
Wood swells, shrinks and settles, so the two sashes of a double-hung window no longer pull together at the middle. That gap is the biggest leak in many old windows.
Cold glass and cold frames
Thin glass chills the air next to it, and that cold air slides down into the room. The window feels drafty even when it seals well.
Gaps in the trim you cannot reach
Gaps where the frame meets the wall can let in air too. Small ones can be filled by hand, and large ones are a landlord repair.
Try this first (free)
Do these in order, starting with the simplest.
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1. Find every leak
Tool used: Incense stick or tissue stripOn a windy day, hold a stick of incense or a strip of tissue about an inch from the window edges and the middle where the sashes meet. Moving smoke or a fluttering tissue shows a leak. Keep the flame away from curtains.
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2. Lock every window and clear the track
Close each sash firmly and turn the lock so the sashes pull together. Vacuum dust and grit out of the track so the sash sits flat.
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3. Add curtains for the cold glass
Tool used: Heavy curtainsClose heavy curtains at dusk and open them on sunny days. They will not stop a leak, but they stop the cold from reaching you.
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4. Wipe the gap clean and dry
Tool used: Dry ragRope caulk grips clean surfaces. Run a dry rag along the gap to remove dust and loose paint flakes.
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5. Press in the rope caulk
Tool used: Removable rope caulkPull off a length, warm it in your hands, and press it into the gap with your thumb. Keep the bead thin, and keep it out of the lock and moving track. Seal only windows you will not open this winter.
IllustrationCheck price on AmazonTool for this step
Removable rope caulk · Measure the gap lengths and buy a little extra
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6. Ask in writing for the big fixes
If you can see daylight through a gap, glass is loose, the frame is soft or a window will not shut, email your landlord with photos and keep a copy. Repairs like these are often their job.
When free fixes aren't enough
Towels and curtains slow the air, but they do not seal a gap. If the tissue still flutters at the edges, caulk is the step that stops it. If the pane is single-glazed and the room still feels cold within a foot of it, add a film kit over the window. It is also removable. Rotted frames, loose glass, water stains or mold are repairs, not DIY jobs. Ask your landlord.
Buy the fix
Still stuck after the free fixes? These are the products we would look at.
| Pick | Product | Fixes | Who it's for | Buy |
|---|---|---|---|---|
| Best pick | Removable rope caulk weatherstrip | gaps at the sash, frame and trim that let air in | Renters with gaps they can see or feel who want a fix that comes off at move-out. | Check price |
| Upgrade pick | Window insulation film kit with removable tape | cold glass and leaks across a whole window | Renters with single-pane or very cold windows. | Check price |
Removable rope caulk weatherstrip
Fixes: gaps at the sash, frame and trim that let air in
Look for: Labeled removable and made for indoor use; Stays pliable instead of drying hard; Enough length for your window edges; A color close to your frame, since it stays visible.
- Who it's for
- Renters with gaps they can see or feel who want a fix that comes off at move-out.
- Honest downside
- You need to open that window this winter, or the gap is wide enough to see daylight through. That is a repair for your landlord.
Window insulation film kit with removable tape
Fixes: cold glass and leaks across a whole window
Look for: Indoor film with tape that the maker says removes cleanly; Enough size to cover your window, measured first; Works with a hair dryer you already own.
- Who it's for
- Renters with single-pane or very cold windows.
- Honest downside
- You need the window open, or the paint around it is flaking, because the tape may lift it.
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How we picked: How we picked: this page is based on renter-friendly draft-proofing guides, instructions from rope caulk and window film makers, and the problems and fixes owners report in reviews. We do not test products by hand.
Where the air gets in: a quick map
- Middle of a double-hung window: where the two sashes meet. The lock should pull them together; fill any gap with rope caulk.
- Sash edges and tracks: press a thin bead into the gap, then keep the track clear so the sash can still move if you need it.
- Sill and trim: where the frame meets the wall. Fill small gaps with rope caulk.
- Window air conditioner: if one is installed, cover it on the inside for winter with a fitted cover.
What to skip
Permanent caulk, spray foam and screws
They work, but you cannot undo them. Caulk in the trim, foam in the frame and nails or screws can leave damage that a landlord may charge you to fix. Use removable products and keep the receipt.
Frequently asked questions
Is rope caulk really removable?
Can I use window film in an apartment?
Will sealing the windows make the room stuffy?
Who pays for window repairs in a rental?
Related problems
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