Repairs · Brampton
Garage Door Perimeter Weatherstrip
With the door closed and the garage lights off, a thin bright line runs down the whole left side of the opening.
In plain words
For an attached garage the perimeter seal does more than keep leaves out. The garage is a buffer between the weather and the house, and drafts around the door cool the wall it shares with the kitchen and the floor of the room above it. Snow blown in melts and refreezes on the slab, and mice follow the warm air in at open corners. A well-fitted side and header seal closes those paths and eases the job of the weatherstripped door between garage and house, though the garage's warmth also depends on the door's own seal, the ceiling and the heating. It is a worthwhile comfort improvement for the house.
How the visit goesThe vinyl strip around the door used to be soft and white. Now it is grey and hard, cracked every few inches, and a piece near the corner snaps off in your fingers. It no longer bends toward the door at all.
Garage Door Perimeter Weatherstrip
How the visit goes
Probing the jambs and header
The strip is only as secure as the wood behind it, so the jambs are probed with an awl along their length and especially the lowest part, where slush and salt sit all winter. Soft, dark or crumbling wood is marked for repair. The header is checked for sag and for gaps opening between it and the top section. Where the jambs are clad in aluminum or vinyl, the technician looks for what the cladding hides and for where the seal can be fastened through to solid material. This step often adds a splice of new lumber or PVC trim to the job, and it is what makes the new seal stay put.
Fitting the sides and closing the corners
Each side length is cut to run from tight under the header piece down to the floor, with a little spare to trim in place. It is set with the same light contact as the header and fastened top to bottom. At the top corner, the side fin tucks under the header fin so they overlap, leaving no square hole for drafts or mice. At the floor the side is trimmed to meet the bottom seal on the door, so the seal is continuous around three sides and hands off to the fourth. Both sides are done the same way, checking the door edge gap as they go.
Keep paint off the fin
When the trim is next painted, the flexible fin stays bare. Paint fills the flexible material and stiffens it, and a stiff fin cracks well before its time once the cold takes hold. If the rigid part of the stop is wood, it can be painted, but with the brush kept off the fin or the fin masked. One-piece vinyl stop needs no paint at all and simply washes clean. This single habit is the difference between a seal that stays soft for many years and one that fails early, and it is the most common cause of early failure the technician sees.
Garage Door Perimeter Weatherstrip
In the van
Silicone spray lubricant
Vinyl stop moulding with integral seal
Exterior screws and weatherproof staples
Utility knife and mitre saw
Epoxy consolidant and exterior primer
Garage Door Perimeter Weatherstrip
What affects the quote
Commercial or oversized openings
Wider and taller commercial doors often carry an aluminum retainer with a rubber insert or a brush seal, and the material and fitting time differ from a residential vinyl seal.
Adding a brush or foam seal to the sides as well as the stop
Some households want only the top and side stop replaced, while others add a brush or foam seal along the same run for a tighter fit against wind-driven snow. That extra material and the time to fit it are agreed before the old stop comes off.
Partial replacement
Replacing one damaged length rather than all three is a smaller job, provided the remaining pieces are still soft and the profile can be matched.
What to have ready
- What colour is the trim around the door?
- Is anything stored against the jambs, or a car parked close to the opening?
- Is the bottom seal on the door also worn?
Garage Door Perimeter Weatherstrip: questions
QuestionsHow should I look after the new seal?
Four times a year, check for daylight from inside with the lights off and press the fin to feel that it is still soft. Wipe the seal with a damp cloth to clear grit and salt, keep paint off the fin, apply a silicone wipe before winter, and keep slush and bins away from the bottom of the jambs. Press any lifted corner back and call if a length has come loose.
How can I tell the side and top seal needs replacing?
Close the door, turn off the garage lights and look along the edges for daylight. Then press the fin with a thumb: it should be soft and spring back. Hardness, cracks, pieces missing, a strip hanging loose, snow or leaves inside along the edge, or a fin that has folded under and torn are all signs. A rubbing squeal as the door moves is another.
Will a new seal make the room above my garage warmer?
It can help. Drafts around the garage door cool the garage, and the garage cools the floor above it and the wall it shares with the house. Closing the perimeter cuts those drafts, though how much warmer the garage runs depends on the door's own seal, the ceiling insulation and how the space is heated, not the perimeter alone. A technician can talk through those as separate steps if the room stays cold.
Related services
- Garage Door Tune-UpHalfway up, the door shudders.
- Off-Track Garage Door ResetThe morning after a thaw the opener groaned, the door stayed stuck to the icy floor for a second, then lurched up crooked.
- Garage Door Panel ReplacementAfter an overnight freeze the door stuck to the slab, the opener strained, and something gave.