Repairs · Clarington
Garage Door Bottom Seal Replacement
The gap under the door is a finger wide at one end and nothing at the other. The door itself looks straight, but the floor drops away toward the corner where the slab has settled, and drafts pour through the wedge.
Garage Door Bottom Seal Replacement
In plain words
Not every gap under a garage door is the seal, so the service begins with finding out what the gap is. A strip of light the whole width usually means a seal that has flattened or hardened. A gap at one corner only points to a door hanging out of level or a slab that has settled there. A gap in the middle suggests a bowed bottom section or a crowned floor. Reading these before choosing a seal means the new strip is sized to fill the space that is really there, and any door or floor issue is named and dealt with rather than hidden behind a thicker bulb.
How the visit goesThe strip under the door has gone as hard as a hose left out for ten summers. Press it and it does not give; bend it and it cracks. Where the door meets the floor it sits on the concrete without squashing at all.
Clarington
How the visit goes
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.
Closing the door onto the new seal
The clamps come off, the opener is reconnected, and the door is run closed under power while the technician watches the bottom edge meet the floor. The down limit is adjusted so the seal compresses gently along its full length without the section bowing, and the force setting is checked so the door settles onto the new, taller strip without reversing. From inside with the lights off, the floor line is checked again for daylight. The reversing test with a 38 mm (1.5 in) solid object, or a 2x4 laid flat under the door, and the photo-eye test finish the visit, and you are shown the door closing before the ladder is packed.
The rest of the weather line
With the bottom sealed, any remaining draft points to the perimeter: the vinyl fin on the stop moulding at the jambs and header, and the joints between sections. These were looked over during the visit and anything torn, shrunk or missing was pointed out. Replacing perimeter stripping is straightforward work that can be planned for a mild day. Together with a sound bottom seal and, where the floor calls for it, a threshold, the garage gains a stronger barrier against wind, water and cold on all four edges, and an attached garage can stay closer to the temperature of the house.
Garage Door Bottom Seal Replacement
In the van
- Threshold seal and adhesive
- Silicone spray lubricant
- Straightedge and tape measure
- Bead-style bottom seal
- Bulb or U-style bottom seal
What affects the quote
Same fees day, night or weekend
1Season and conditions
A seal frozen to the slab, ice at the threshold or working in deep cold adds time for freeing the old strip, clearing the line and keeping the new roll warm enough to feed.
2Retainer replacement
If the aluminum or plastic retainer is bent, spread open or corroded, a new extrusion, fasteners and the time to fit it straight along the rail are added as their own line.
3Wood door nail-on strip
A wood door with a nailed strip takes a different product and more fastening time than a channel seal, and adding a retainer to a wood rail is a further option to consider.
Garage Door Bottom Seal Replacement: questions
Should I choose the tallest seal available?
Not as a rule. The seal should fill the measured gap with a little compression to spare. A profile far taller than the gap gets squashed flat, wears at the fold, bows the bottom section and can make the opener reverse. Where the floor dips at one end, a taller bulb is the right call for that door; where the floor is flat, a standard height lasts longer. Measuring first is what settles it.
What happens during the visit?
The technician maps the gap with the door closed, checks the door is level and the bottom section straight, and identifies the retainer and profile. The opener is disconnected and the door clamped at working height. The old seal comes out, the channels are cleaned, a new seal is cut and fed in, and any retainer work is done. The door is then closed under power, the opener reset, and the reversing and photo-eye tests run.
How long does a bottom seal last?
Several years is typical, with the range set by exposure. A door facing south or west, a threshold that is wet and salted all winter, and a seal that freezes to the floor a few times a season all shorten the life. A shaded door on a dry slab with a wipe of silicone each autumn can go much longer. The condition of the strip, rather than its age, is what to watch.
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Garage Door Bottom Seal Replacement near you
From a stuck door on a winter morning to a planned replacement before the house goes on the market, the services on this page cover what garage doors in Clarington typically need. Each one explains what is checked, how the work is done and what you can expect afterwards.