Seals That Affect a Garage Door
- Bottom seal or astragal along the floor
- Side and top weatherstripping around the opening
- Threshold seals where the floor is uneven
- Section joints and window gaskets on some doors
The right seal depends on the door construction, floor condition, and how the door travels. A seal that is too tall, too stiff, or poorly aligned can cause the door to reverse or bind.
Safe Inspection
With the door closed, look for daylight around the perimeter and check whether the bottom seal is cracked, flattened, or missing sections. Do not loosen cables, springs, or bottom fixtures to change a seal.
When Sealing Is Not Enough
A rotted, bent, or delaminated bottom section may need repair or replacement before a new seal will work. If the door is noisy, crooked, or difficult to close, inspect the complete system rather than adding weatherstripping over a mechanical problem.
Related reading: garage door will not close and garage door installation.