Skip to content
DynesGarage Door ExpertsOpen 24/7 (289) 816-2884
Gloved hands setting a black rubber seal along the base of a white garage door, holding a ribbed strip over paving stones. — Garage Door Bottom Seal Replacement, Strathcona Gardens

Repairs · Strathcona Gardens

Garage Door Bottom Seal Replacement

Every mild afternoon the snow melts off the car, runs to the door, and by morning the rubber strip along the bottom is frozen to the concrete. Last week the opener lifted the door and left half the seal on the floor.

In plain words

The bottom seal, called an astragal in the trade, is the flexible strip along the underside of the lowest door section that squashes against the floor when the door closes. On most steel doors it is a U-shaped vinyl or rubber profile whose two edges slide into the channels of a retainer fixed to the bottom rail; on wood doors it is often a flat angled strip nailed in place. Replacing it means matching that retainer and profile, fitting a fresh seal the full width of the door, and confirming it meets the floor in one continuous line so light, drafts, water and pests lose their route in.

Sound familiar?Strathcona Gardens

The call
With the door closed and the lights off, a bright line of daylight runs along the floor from one side to the other. Leaves and grit have blown in under it and gathered in a neat drift against the back wall.

NextHow the visit goes

Garage Door Bottom Seal Replacement · Strathcona Gardens

How the visit goes

Technician on a blue ladder holding a wrench at a coiled torsion spring above a white garage door. — Strathcona Gardens
  1. Scene 1

    The floor and the threshold

    The concrete under the door is half of the seal. The technician looks at the slope of the driveway toward the opening, the condition of the slab edge where the seal lands, cracks, spalled patches and any step between the slab and the apron. A garage floor that has heaved or settled over the decades is common, and the shape it has taken decides whether a standard seal, a taller bulb profile or a threshold seal glued to the floor gives the most even contact. Where water arrives from outside, the path it takes is noted so the seal and any threshold are placed to meet it.

  2. Scene 2

    Adding a threshold seal on a difficult floor

    Where the slab slopes toward the garage or has a dished edge, a threshold seal glued to the floor follows the existing contour and gives the bottom strip a raised, consistent edge to meet, rather than levelling the floor itself. The floor line is marked with the door closed, the concrete is swept and cleaned for the adhesive, and the threshold is dry-fitted and trimmed against each jamb. Adhesive is laid along the underside, the threshold pressed down, and the door lowered onto it while it sets. The result is a small raised lip on the outside that turns water back to the driveway and a bottom seal that lands on a consistent edge along its length.

  3. Scene 3

    A clear threshold through winter

    The seal closes onto whatever is on the floor, so the threshold deserves a moment when you clear the driveway. Push packed snow and the ridge of ice that forms where the door meets the slab away from the opening before running the door, and sweep salt piles and grit clear of the line so they are not ground into the strip. Park a little further in, if the garage allows, so drips from the car fall on the floor rather than at the seal. These are the same habits that protect the bottom brackets and cables in the corners.

In the van

  • Self-drilling retainer screws
  • Threshold seal and adhesive
  • Aluminum bottom seal retainer
  • Bulb or U-style bottom seal
  • Nail-on vinyl strip for wood doors

What shapes the quoteDynes Garage Door Experts

Floor and threshold shape
A dished, sloped or heaved slab may call for a taller bulb profile or a threshold seal on the floor, each of which is quoted as a separate choice you can accept or leave.
Threshold seal added
Where a floor threshold is recommended, its length, its type, whether rubber or aluminum-backed, the adhesive and the floor preparation before it is laid appear as a line of their own.
Door out of level
If one corner of the door hangs low because of cable or spring tension, levelling the door is separate work done before the seal goes in and is priced on its own.

FeesSame any hour

Have it ready

Before you call · 0 / 3

(289) 816-2884

The questions that come up

How long should I allow for the work?

Plan on an hour or two for a straightforward replacement on a standard door, including the inspection and the opener reset. A retainer replacement, a hardened seal that has to come out in pieces, a wood door with a nail-on strip or the addition of a threshold seal each add time. The technician will give you a realistic window once the door has been looked at.

My garage floor is uneven. What are the options?

Three, and they can be combined. A taller bulb-style seal compresses more and follows a modest dip or crown. A threshold seal fixed to the floor follows the slab's existing contour and gives the door a raised, consistent line to land on where it is dished or sloped. And where the floor has heaved or broken up badly, grinding or patching the concrete is a separate job that makes any seal perform better. The gap map from the first look shows which applies.

Should the side and top weatherstripping be replaced at the same time?

It is worth having them looked at while the technician is there. The vinyl fin on the stop moulding around the jambs and header shrinks, tears and hardens on the same schedule as the bottom seal, and a draft that survives a new bottom seal usually comes from the sides. Doing the perimeter in the same visit saves a return trip and leaves the door sealed on all four edges.

Strathcona Gardensinformation

HaltonOntario

Garage Door Bottom Seal Replacement · Burlington, Dynes, Elizabeth Gardens, Longmoor, Orchard, Port Nelson, Roseland

Town
Strathcona Gardens, Halton
In business
19 years
Hours
Open 24/7
Nights, weekends and holidays, same fees
Visits
On-site assessment preferred. Request a visit or call.

2021 census: what it means at the door

Every square is one home in a hundred.

  • 47 in 100 homes · mixed ages
  • About 47% of homes in Burlington were built in 1980 or earlier, according to the 2021 Census.Where housing ages are mixed, many older houses have already had a newer door and opener fitted, so the door's age and the house's age are not the same thing. The technician reads the door itself, its spring type, tracks and opener, before recommending anything.
  • Single-detached houses make up about 50% of homes in Burlington (2021 Census).Where housing is varied, security needs vary too. A detached home wants its garage door closing fully and its interior door respected; a townhouse or condo wants old fobs and remotes cleared and the shared entrance working. We address whichever applies at each door.

Source: Statistics Canada, Census Profile

Open Strathcona Gardens in Google Maps

On-site assessment

Request a visit.

Every mild afternoon the snow melts off the car, runs to the door, and by morning the rubber strip along the bottom is frozen to the concrete.

(289) 816-2884, open 24/7.