Window and Door Draft Stoppers for a Cold Rental

It’s a Tuesday night in November and you’re on the couch with a blanket pulled up to your chin. The thermostat says 68. Your ankles say otherwise. There’s a thin, steady current running across the floor, and if you follow it, it leads to the front door, where a line of hallway light glows along the bottom.

Rentals are cold in a specific way. The windows are older than you’d like, the door was hung by someone in a hurry, and the heat comes on and on and the couch never quite gets warm. You can’t replace the windows or rehang the door, because they aren’t yours. You can still close the gaps, as long as everything comes back off when you move.

Think of the apartment as a winter coat someone handed you with the zipper half down and the cuffs loose. You don’t need a new coat. You need to zip it up. Below are eight ways to do that, sorted by where the cold gets in, and the two we’d buy first. Every pick was a live listing when we checked on October 26, 2026. All eight are on Amazon, which shows its own prices, so you’ll find those there rather than here.

Find the open zipper first

Before buying anything, spend five minutes looking for the leak. On a cold, windy evening, turn off the lights and walk the edges of the room. Hold the back of your hand near the bottom of each exterior door, along the seams where window sashes meet, and around any window AC unit that stayed in for the winter. A draft you can feel on your skin is a draft worth fixing.

Most rentals have two big ones: the gap under the door, and the windows themselves. Those get the first picks below. The small seams come after.

Fix the gap you can feel from the couch first. Everything else is the cuffs.

The pick we’d start with: the gap under the door

Picture the door from the hallway side: a strip of light along the floor, and a strip of warm air leaving through it all night. This is the open collar of the coat, and it’s the easiest one to close.

The Everlasting Comfort under door draft stopper slides onto the bottom of the door and wraps both faces of it. A foam tube sits on each side and swings with the door instead of getting kicked out of the way. The listing calls it renter friendly, and it’s honest about why: no drilling, no tape, no tacks. You cut the foam to length, slip it into the cover and slide it under. It fits doors 30 to 36 inches wide with a gap between a quarter inch and an inch and a quarter. Everlasting Comfort says to measure that gap before ordering (the listing also says it won’t work on barn doors).

The cover is polyester and machine washable, dried on low. It’s black, which disappears against most door bottoms. If we were moving into a drafty apartment tomorrow, this is the first thing we’d unpack.

For the door that won’t take a sleeve

Some doors fight a slide-on stopper. Maybe the gap is bigger than an inch and a quarter, or there’s a raised threshold, or it’s a sliding glass door that opens onto a balcony and lets in a little winter with it.

A weighted snake doesn’t attach to anything, which is the whole appeal. The Sunolga door draft stopper is 38 inches long and filled with heavy glass beads, so it stays where you put it and covers gaps up to 3 inches. The extra length is meant to reach the corners of the frame, where the cold tends to sneak around a shorter one. Its gray cover unzips and goes in the washer, and there’s a loop at each end so you can hang it on the doorknob when you leave.

The tradeoff is that it stays on the floor. Every time you open the door, you nudge it back into place with your foot. For a door you use a few times a day, that’s fine. For the door you come in through with your arms full of groceries, the sleeve above is less fuss.

The thin sleeves: clear film over the windows

Old rental windows are the coat’s thin sleeves. Glass doesn’t hold heat well, and a window that rattles in its frame lets air through the seams as well. If you’ve ever put your hand on the glass on a January night, you know.

Shrink film is the fix that looks too simple to work. You tape a clear sheet of plastic to the window trim, then wave a hair dryer over it until it pulls tight and nearly disappears. The film traps a layer of still air between itself and the glass, which is the same idea as wearing a jacket over a sweater.

The Duck Brand window insulation kit comes with two 62 by 210 inch rolls of film and two rolls of half inch tape, enough for up to ten standard 3 by 5 foot windows. You cut the film to size, so there’s no measuring ahead. Duck says to apply it indoors on clean, dry trim, including painted or finished wood, aluminum and vinyl, and that the kit removes easily once the season is over. Duck pitches it as a way to save on energy costs; we’d think of it more as the window that stops breathing cold air on the back of your neck.

Two honest caveats. A sealed window doesn’t open until spring, so skip the one you crack for air after cooking. And any tape on old rental paint deserves a test strip in a hidden corner first, which takes a minute and could save an awkward conversation at move-out.

For the sliding door or the giant window

The standard kit tops out at 62 inches wide, and a patio door laughs at that. The Duck MAX Strength kit comes in two 84 by 120 inch rolls with tape, enough for two patio doors or XL windows, or four large 4 by 6 foot windows. Duck says the film is twice as thick as its standard kits and puncture resistant, which matters on a door at pet height. Like the standard kit, it goes on with scissors and a hair dryer and, per the listing, removes easily when winter’s done.

The catch is obvious once you picture it: a filmed-over sliding door is a door you don’t use until April. If that’s your only way onto the balcony, lay the weighted snake along the bottom of the door instead. If the balcony is a summer-only room anyway, this turns a wall of cold glass back into a wall.

The loose cuffs: gaps around the window frame

Some windows leak at the edges more than through the glass. Run your hand along the seam where the sash meets the frame and you’ll feel it, a thin, cold line.

Mortite is the old-school answer, and it’s the most renter-friendly thing on this list. Frost King’s fingertip caulking cord is a soft gray putty rope, 1/8 inch thick and 90 feet long. You peel off a strand and press it into the gap with your fingers. No caulking gun. The listing says it won’t harden, so it seals tight and can be easily removed, which means in April you pull it out like a loose thread. It works on wood, plastic, metal, masonry and glass.

It’s gray and it shows, so it’s best for gaps you won’t stare at. We’d use it on the bedroom window, where the draft matters more than the look.

If the gap is somewhere you’d see it every day, DAP’s Seal ‘N Peel is the clear version of the same idea. It’s a removable caulk in a 10.1 ounce tube, which means a standard caulking gun. DAP’s listing says it peels away easily, won’t damage painted surfaces, and makes a watertight, weatherproof seal, indoors or out. The listing names 40 to 100 degrees, which we read as the range to apply it in, so this is a job for a mild fall afternoon instead of a January one.

For the windows you won’t open all winter

Some windows have a seam that’s too wide for caulk cord and too awkward for film: the gap where the top and bottom sashes meet, or the foam around a window AC unit that’s been in since July.

SWRT’s clear window sealing tape is a 2 inch wide, 8 mil clear tape, 30 yards long, and you just run it over the seam. It’s meant for windows, doors and AC units, and the listing says it goes on easily and comes off without leaving sticky residue. Cut it to fit, press it flat and the seam is closed. Like the film, it means that window stays shut until spring, and like any tape on rental paint, it deserves a test strip in a hidden corner first.

The lining: a quilted layer behind your curtains

Even a sealed window gives off cold at night. You can feel it from a couple of feet away, a chill falling off the glass and pooling on the floor. Curtains help, and a thick lining helps more, the way a quilted lining makes a thin coat into a winter one.

The DriftAway quilted curtain liner is one 50 by 80 inch panel (the pack has one liner, so a pair of curtains needs two). It comes with eight metal rings to hang it behind grommet curtains on the rod you already have. DriftAway says the thick quilted layer helps block outdoor drafts in winter, and it’s soft to the touch, which you’ll appreciate when you pull the curtains shut at 5pm in December. It isn’t sold as a full blackout liner, so if dark mornings are the bigger problem, our blackout curtains guide has liners built for that. Machine wash cold on gentle in a mesh bag, tumble dry low.

Nothing to install and nothing to patch. It comes down with the curtains.

What we’d buy

For most cold rentals, we’d start with two things. Put the Everlasting Comfort stopper on the door that faces the hallway or the outside, and the Duck window kit on the two or three windows nearest the couch and the bed. Together they close the collar and the sleeves, and neither one leaves a hole in anything. If the window frames leak at the seams, add the Mortite, which presses in by hand and, per the listing, peels back out. If you have a balcony door, decide whether you’ll use it this winter before choosing between the snake and the big film kit.

We left out the self-adhesive foam strips that go around door frames. They’re made to stay stuck, and for a renter, a listing that promises clean removal matters more than a slightly better seal. We’d also skip any listing that promises a specific cut to the heating bill. Your landlord’s boiler (and your lease) decide more of that than a foam tube does.

None of this makes an old apartment new. It can make the couch the warm spot it was supposed to be, the blanket optional by mid-December, and the line of hallway light under the door a thing you used to see.