Door Weatherstripping & Threshold Replacement
Door weatherstripping and threshold replacement is the door-perimeter seal job — kerf-in V-strip and foam at the jamb and head, a new door sweep at the bottom edge, an adjustable saddle threshold with riser screws, plus weather-resistant corner pads at the threshold-to-jamb joint — and starts at $150 for a single door. The dark line of daylight you can see under the front door at sunset, the V-strip at the doorjamb that has gone hard and no longer touches the door when it closes, the bronze threshold worn smooth to a mirror finish from fifteen years of shoes, the back-door sweep that drags on the slate but still does not seal. Door drafts are a 30-minute fix that most homeowners put off for a decade because the parts are cheap but the install is finicky. Handis replaces door-perimeter weatherstripping, swaps adjustable thresholds, and installs the right sweep for your door type in one visit. Whole-home weatherization (attic-hatch, dryer-vent, garage seal) lives on the separate [weatherization sub-hub](/services/handyman-and-home-repairs/weatherization-and-drafts).
Service
What Does a Door Weatherstripping Visit Include?
Door weatherstripping is the seal work on the four sides of one door opening — kerf-in V-strip or foam pile at the jamb and head, a face-mount or snap-on sweep at the bottom edge of the door, an adjustable saddle threshold with riser screws underneath, and weather-resistant corner pads where the threshold meets the jamb base. It is door-specific weatherization. The rest of the building envelope — the attic hatch, the dryer-vent gasket, the garage-door bottom seal — lives on the separate weatherization-and-drafts page. Same truck either way, but the diagnosis and the parts are different.
What Is Kerf-In Perimeter Weatherstrip and How Is It Replaced?
The flexible V-strip or foam-pile strip that sits in a kerf (a routed slot) along the doorjamb and head, touching the door face when closed. The kerf-in strip on most modern exterior doors comes out and goes back in by hand — no screws, no nails. We pull the old strip (which has usually gone hard and lost its memory), measure the kerf depth, and install fresh kerf-in strip in foam or rubber at the right thickness. Standard 8-foot length covers one door.
Door Sweep Replacement
The strip across the bottom edge of the door that seals against the threshold. Older sweeps are aluminum-framed vinyl that screws into the door bottom face — they wear from dragging on a high-pile carpet or a raised threshold. We measure the door width, pick the right sweep type (face-mount for steel and wood, snap-on for some fiberglass doors), and install with adjustable mounting so the sweep just kisses the threshold without dragging.
When Do You Need an Adjustable Threshold Replacement?
The saddle threshold under an exterior door is usually aluminum with a vinyl insert on top — the part that the door sweep seals against. After 15 to 20 years the vinyl insert goes flat or the aluminum gets worn through to the wood subfloor underneath. We pull the old threshold, check the subfloor for rot, install an adjustable threshold with riser screws (turns to raise or lower the insert), and set the height so the door sweep seals without dragging.
Magnetic Weatherstripping on Steel Doors
Steel exterior doors use magnetic weatherstripping — a thin metal strip embedded in the rubber that the steel doorframe attracts when closed. The result is a positive seal without compression. Replacement strip is door-specific (Therma-Tru, Pease, Stanley each have different profiles); we identify the door brand and order the right strip if it is not on the truck.
Storm Door & Screen Door Weatherstripping
The strip at the storm-door perimeter (different from a screen-door perimeter) seals against the main exterior door behind it. We replace the foam pile or vinyl strip at the storm-door frame and along the door sash — this is the strip that decides whether the storm door adds any meaningful R-value or is just an aluminum window in front of your real door.
Threshold Corner Pad Install
The triangle of weather-resistant rubber or foam that fills the gap between the threshold end and the doorjamb base — the spot where most exterior doors leak even after the perimeter strip is fresh. A $5 pad and a 2-minute install closes the highest air-infiltration corner on the door. We install corner pads on every threshold replacement we do.
How Door Weatherstripping & Threshold Replacement Works
Six sequential steps from the dollar-bill draft test to the corner-pad seal — the order we follow on every door-perimeter visit so the V-strip, sweep, and threshold all seal as one system.
Diagnose the Draft Locations
Run a hand around the perimeter on a cold morning, close the door on a dollar bill at three points (top, side, bottom), and look at the V-strip for flattening or pulled-away sections. We identify whether the leak is at the perimeter, the bottom, the threshold, or the threshold-to-jamb corners.
Pull the Old Kerf-In Strip
The kerf-in V-strip or foam-pile strip pulls out of the routed slot at the jamb and head by hand — no screws, no nails. We pull the hardened original, vacuum the kerf clean, and measure the kerf depth (1/8, 3/16, and 1/4 inch are common).
Install Fresh Perimeter Strip
Match the strip thickness to the kerf depth — wrong depth either falls out (too thin) or holds the door open when it closes (too thick). Foam or rubber V-strip pressed into the kerf along the head first, then the latch jamb, then the hinge jamb. Standard 8-foot length covers one door.
Swap the Door Sweep
Pull the existing aluminum-framed sweep at the bottom edge, measure the door width, pick the right sweep type (face-mount for steel and wood, snap-on for some fiberglass), and install with adjustable mounting slots so the sweep just kisses the threshold without dragging.
Replace the Adjustable Threshold
Pull the worn aluminum saddle, check the subfloor for rot (small patches treated with epoxy hardwood patch and primer, larger rot routes to carpentry), install the new adjustable threshold, and turn the riser screws to set the vinyl insert height. Sweep clearance verified across the full door width.
Install Corner Pads at the Threshold-to-Jamb Joint
The triangular gap where the threshold meets the doorjamb base is the single most-overlooked draft on an exterior door. A $5 weather-resistant rubber or foam corner pad on each side closes the highest air-infiltration corner on the door. Standard on every threshold replacement.
Door Weatherstripping & Threshold Pricing
Final pricing depends on door type, whether the threshold needs replacement, and how many doors are bundled into a single visit. Brand-specific magnetic strip on steel doors may require parts ordering. Request a free estimate for an accurate quote.
Tell us the doors and the drafts — perimeter, bottom, threshold — we will quote the visit.
Why Handis for Door Weatherstripping
The single most-overlooked draft on an exterior door is the corner where the threshold meets the doorjamb — a small triangular gap, maybe a quarter inch on each side, that the perimeter strip and the sweep together never close. Cold air finds it within hours of the first frost. A $5 weather-resistant corner pad and two minutes of installation closes more measurable air infiltration than the entire perimeter strip replacement. We install corner pads on every threshold visit. The cheapest energy upgrade a Seattle homeowner can do is also the one almost no installer remembers to offer.
Kerf-in strip in foam or rubber, sized to the kerf depth
The kerf channel along the doorjamb and head comes in different depths — 1/8, 3/16, and 1/4 inch are common. The wrong-depth strip either falls out (too thin) or holds the door open when it closes (too thick). We measure the kerf before any strip goes in.
Adjustable threshold sets the sweep clearance
Modern thresholds have riser screws across the top — turn them to raise or lower the vinyl insert that the sweep seals against. We set the clearance so the sweep just kisses the insert without dragging across the bottom of the door when it opens. The setting is repeatable from season to season as the door swells and shrinks.
Corner pad on every threshold replacement
The triangle gap at the threshold-to-jamb corner is where most exterior doors actually leak. A weather-resistant rubber or foam corner pad — $5 in materials, two minutes to install — closes the gap. Standard on every threshold visit at no extra charge.
Steel door brand identified before parts arrive
Magnetic weatherstrip on steel exterior doors is brand-specific. We identify the door — Therma-Tru, Pease, Stanley, Masonite — on the booking call. Strip in stock for the common brands; less common doors get a parts order and a return install visit.
Distinct from whole-home weatherization
This page handles door-perimeter work. The rest of the building envelope — attic-hatch insulation, dryer-vent perimeter caulk, garage-door bottom seal, outlet gaskets — lives on the separate weatherization and drafts page. Same truck either way, but the diagnosis and the parts are different.
Estimate
Tell us which doors have drafts, where you can feel the air (under the door, along the side, at the threshold corner), and whether the threshold itself looks worn. We will quote the visit.
Customer Reviews
Door weatherstripping and threshold replacement reviews from real Handis customers.
Front door of our 1980s house had a draft I could feel from across the entryway every January. Tech replaced the kerf-in strip along all three sides, swapped the sweep on the door bottom, and installed corner pads at the threshold. He also pointed out that the threshold itself was worn through but did not push me to replace it that visit — said it could wait a year. Draft is gone. Honest call.
Back door threshold worn down to the wood subfloor. Tech pulled the old aluminum saddle, checked the subfloor (small rot patch he treated with hardwood patch and primer), installed a new adjustable threshold, and set the sweep clearance. Door closes flush against the new insert. Got two cold winters out of it before any maintenance needed.
Storm door plus main door at the side entry. Tech replaced the weatherstrip on both — storm door foam pile along the frame and main door kerf-in strip on the jamb. Both sweeps swapped, corner pads at the main door threshold. The combination cut the cold-floor feeling in the laundry room next to that door by half. Should have done both at once years ago.
Steel exterior door at the back, Therma-Tru. The magnetic strip had gone hard and the door no longer held the magnetic pull when closed. Tech identified the brand, had the right replacement strip on the truck, swapped it in 30 minutes. The door pulls itself shut against the magnet now — exactly how it worked when the house was new.
Two exterior doors, front and back, both with the same hardened perimeter strip from 1995. Tech worked both in one visit — pulled the old strip out of the kerfs, installed fresh foam pile at the right depth, swapped both sweeps, set the threshold sweep clearance on each. The whole entryway feels twenty degrees warmer at sunset. Two-door rate cheaper than booking each separately.
Frequently Asked Questions
Common questions about door weatherstripping and threshold replacement.