What kind of weatherstripping is best for a door?

It depends on where it goes. For the sides and top of the door (the jamb), V-seal (tension seal) and compression bulb seals are durable and hide well; adhesive foam tape is cheapest but wears fastest. For an old door with a kerf slot in the jamb, kerf-in weatherstripping with a barbed flange is the cleanest, longest-lasting choice. For the bottom gap, a door sweep or a door shoe. Match the type to the location and the size of the gap.

How do I know if my door needs weatherstripping?

On a cold or windy day, run your hand around the closed door — you will feel drafts at worn spots. At night, have someone shine a flashlight around the door from outside while you look from inside; light coming through means a gap. A dollar bill closed in the door should drag when you pull it; if it slides out freely, the seal there is too loose. Visible daylight at the bottom corners is the most common giveaway.

How do I measure the gap for weatherstripping?

Close the door and measure the gap between the door edge and the jamb with a ruler or by closing a thin object in it. Most weatherstripping is sold by the gap range it seals — pick a product rated to fill your gap when compressed, not one so thick the door will not latch. For the bottom, measure the gap between the door bottom and the threshold to size a sweep. Too thin leaves a draft; too thick strains the hinges and latch.

What is a door sweep and how do I install one?

A door sweep is a strip with a flexible fin or brush that mounts to the bottom of the door and drags lightly across the threshold to seal the gap there — the biggest single draft on most doors. You cut it to the door width, hold it so the fin just contacts the threshold when the door is closed, and screw it to the inside face of the door. Adjustable sweeps have slotted screw holes so you can fine-tune the height.

Will weatherstripping stop my door from closing properly?

It can if you choose stripping that is too thick for the gap or install it proud of the surface. The seal should compress lightly when the door closes, not fight it — if the door has to be forced or will not latch, the stripping is too thick or misplaced. Choose a product rated for your measured gap, fit it to the stop so it meets the door face, and test the latch as you go. A correct install seals firmly yet closes easily.

How to Weatherstrip a Door: A One-Hour DIY Guide

Written & researched by Derek Holt Home & Appliances Editor

Updated August 2026

Golden-hour view of a person adjusting a wall thermostat in a warm hallway

Affiliate Disclosure

Some links on this page are affiliate links. As an Amazon Associate, we earn from qualifying purchases — at no extra cost to you. We do not buy, test, or physically handle the products we cover; our rankings come from aggregated owner reviews, ratings and expert consensus. Commissions never change our verdicts. How we rank · full disclosure.

Weatherstripping a door is one of the cheapest, fastest energy fixes — plan on under an hour, $10 to $40 in materials, and no special skill. Drafts around an exterior door waste heating and cooling and let in cold, dust, and bugs. You find the gaps, pick the right stripping for each location, cut and fit it to the jamb, and add a sweep to the bottom. The one judgment call is thickness: the seal should compress lightly, not stop the door latching. There is no risk here beyond a pinched finger.

We never buy, test or physically handle the products we rank; recommendations come from aggregated owner reviews and expert consensus, described in how we rank. More at the heating and cooling hub.

How to Weatherstrip Your Exterior Door — DIY Playbook

Tools and materials

Weatherstripping for the jamb — V-seal, compression bulb, or kerf-in to match your door.
A door sweep sized to your door width and bottom gap.
A tape measure, utility knife or scissors, and a hacksaw or snips for a metal sweep.
A drill/driver for screwed stripping and the sweep, plus a pencil.
For the drafts a sealed door still leaves, a plug-in space heater takes the chill off a cold entry room.

Close-up detail of the material being worked in a heating & cooling project, in warm evening lamplight

Step 1: Find the drafts and measure the gaps

Close the door and feel around it on a windy day, or use the flashlight test after dark. Measure the gap at the sides, top, and bottom so you can buy stripping rated to seal each one. Note whether the jamb has a kerf slot (a groove for barbed weatherstripping) or a flat stop face, since that decides which product fits.

Step 2: Clean the surfaces

Wipe the jamb stop and the door bottom clean and dry — adhesive-backed stripping only sticks to a clean surface, and screwed stripping seats better on a clean face. Scrape off any crumbling old weatherstripping first.

Three-quarter view of a person adjusting a wall thermostat in a warm hallway, in bright midday sun

Step 3: Fit the jamb weatherstripping

Measure and cut the top piece first, then the two sides, so they meet neatly in the corners. For adhesive V-seal or foam, peel and press it onto the stop where the door face meets it, fold V-seal along its crease so it springs against the door. For kerf-in stripping, press the barbed flange into the jamb slot and seat it with a putty knife. Close the door and confirm it compresses the seal lightly and still latches.

Step 4: Install the door sweep

Measure the door width and cut the sweep to length (a hacksaw for the metal carrier, scissors for the fin). Hold it on the inside face of the door so the fin just brushes the threshold when the door is closed — enough to seal, not so much that it drags hard. Mark the screw holes, drill pilot holes, and screw it on. Adjustable sweeps let you slide it up or down before final tightening.

Close-up detail of the material being worked in a heating & cooling project, in soft overcast light

Step 5: Test the seal

Close the door and re-run the draft check — hand and flashlight. The gaps should be gone and the door should latch with normal effort. The dollar-bill test should now drag firmly at each edge. If the door is hard to close, back off to thinner stripping; if a draft remains, the stripping there is too thin or a corner has a gap to fill.

Common mistakes

Stripping too thick for the gap. The door will not latch. Match the product to your measured gap.
Sticking adhesive foam to a dirty jamb. It peels off. Clean and dry first.
Setting the sweep too low. It drags and wears fast. The fin should just kiss the threshold.
Gaps at the corners. Cut the top and sides to meet cleanly.
Ignoring the bottom gap. It is usually the biggest draft. Always add a sweep.

When you might want a pro

Weatherstripping is fully DIY. Consider a handyman or door specialist only if the door itself is warped, the frame is out of square so gaps vary wildly, the threshold is rotted, or the door needs replacing rather than sealing. Those are carpentry problems weatherstripping cannot fix — but sealing a sound door in a sound frame is a job anyone can do.

How to Weatherstrip a Door