A garage door bottom seal closes the gap between the door and floor. Match its retainer profile and door width before buying. Replacement can be a homeowner task, but reaching the bottom edge may require securing a raised door. Never disturb lift-cable brackets to remove a seal.
Types of bottom seal
| Type | How it works |
|---|---|
| T-end | A T-shaped edge that slides into a retainer track on the door |
| Bulb | An oval bead that compresses against the floor for a tight seal |
| Twin contact | Two contact points with the floor for extra sealing |
| Beaded | A round bead that inserts into a retainer track |
Signs it needs replacing
- Cracks, gaps or a seal that has gone brittle or torn.
- Daylight, drafts or water visible under the closed door.
- Debris or evidence of pests getting underneath.
Measuring and installing
Measure the full width of your door and the retainer channel if it has one, and order slightly more than you measure. Follow the exact seal and door instructions: remove the old seal, clean the bottom of the door, cut the new seal to length, and press or slide it into place. A bottom seal is not the same part as the bottom bracket that holds the lift cables. Do not loosen a bottom bracket or retainer fastener that also secures lifting hardware. If the seal cannot be accessed without raising the door and working underneath it, have a technician fit it.
A bottom seal only covers the floor gap. For the sides and top of the door, see our weather stripping guide. Need a hand fitting one? Call (916) 838-8182.
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