Repairs · Hamilton Heights
Garage Door Bottom Seal Replacement in Hamilton Heights
The strip under the door has gone as hard as a hose left out for ten summers.
In plain words
A seal visit runs in a set order. With the door closed, the technician looks for daylight along the floor line and notes whether the gap is even or concentrated at one point. The door is checked for level and the bottom section for straightness, then the retainer is identified and measured. The opener is disconnected and the door secured before the old strip comes out and the channels are cleaned. A new seal, cut a little long, is fed into the channels and trimmed. Finally the door is closed onto the new seal, the opener's limits are reset, and the reversing test is run before the tools go away.
How the visit goesEvery 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.
Garage Door Bottom Seal Replacement
How the visit goes
Which retainer and which profile
Next the retainer along the bottom rail is identified. Most steel doors carry an aluminum extrusion with two channels that take the T-shaped or beaded edges of a U-shaped seal; some insulated doors have the channel moulded into a plastic bottom cap; older doors may have a single channel; wood doors often have a strip nailed straight to the rail. The technician measures the channel spacing and the T or bead size, checks the door width, and notes the height of the old strip. A seal chosen from these measurements slides in cleanly and holds, which is the difference between a replacement that lasts and one that works loose.
Wood doors and nail-on strips
A wood garage door usually carries a flat or angled strip of vinyl or rubber nailed directly to the bottom rail rather than a channel seal. The technician removes the old strip and nails, checks the rail for soft spots and cupping, and treats or dries damp wood as needed. The new strip is positioned so its lip angles toward the outside and touches the floor along the full width, then fastened with galvanized nails or screws at close, even spacing so it cannot ripple. On a rail that follows an uneven floor, the strip's flexibility takes up the difference.
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
Bulb or U-style bottom seal
Silicone spray lubricant
Straightedge and tape measure
Seal end caps
Garage Door Bottom Seal Replacement
What affects the quote
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.
Retainer 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.
Door width
A single door takes a shorter length of seal than a double, and the widest doors need more time to feed the strip evenly across. The quote starts from the width measured on the day.
What to have ready
- Has the seal frozen to the floor this winter?
- Is the door a single or a double, and roughly how wide?
- Can you send a photo of the end of the bottom section showing the retainer?
Garage Door Bottom Seal Replacement: questions
QuestionsCan the seal be replaced in the middle of winter?
Yes, and winter is when most people notice they need one. Vinyl is stiffer in the cold, so the technician keeps the new roll warm until it is fed and takes a little longer working it across the channels. A seal frozen to the floor is freed by hand first. The door is then closed onto the new strip and the opener reset exactly as in summer, and the garage is sealed for the rest of the season.
How can I tell that the bottom seal needs replacing?
Close the door, turn off the lights and look along the floor from inside. Daylight showing, a strip that feels hard or cracks when pressed, a bulb that has flattened and stays flat, an end hanging out of its channel, chew marks or missing pieces are all signs. So are leaves, snow or a puddle inside the door after weather. Any one of these means the seal has stopped doing its job.
How do I know which size and type my door takes?
Look at the end of the bottom section for the metal or plastic strip that holds the seal. Count the channels, note whether they are slotted or rounded, and measure the distance between them and the width of the door. A photo of the end of the retainer and one of the seal's cross-section is usually enough for the technician to identify the profile before the visit and bring the right roll.
Related services
- Garage Door Tune-UpEvery morning the door announces itself to the whole street: a long metallic squeal as it climbs, a rattle at the top, and a groan on the way back down.
- Off-Track Garage Door ResetThe door came down fine but with a scraping noise, and now the vertical track on one side is bowed away from the wall.
- Garage Door Panel ReplacementYou misjudged the last metre of the driveway and felt the bumper meet the door.