Why does water still come in with a new bottom seal?

Usually the floor is uneven or slopes toward the garage. A different seal profile or a floor threshold is often the fix.

Can the bottom seal freeze to the floor?

Yes, and forcing the opener can tear the seal or strain the door. Freeing the ice first and replacing a damaged seal is the correct approach.

Is the bottom seal the same as the weather stripping on the sides?

No. The bottom seal sits in a retainer on the door itself; perimeter weather seal attaches to the jambs and header.

Garage Door Bottom Seal Replacement

The bottom seal is the barrier between the door and the floor. When it flattens, tears or freezes, water and cold air come straight in.

Gloved hands lubricating a garage door hinge and roller during a maintenance tune-up

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The bottom seal, or astragal, slides into a retainer along the bottom edge of the door and compresses against the floor when the door closes. It handles the toughest conditions on the whole door: standing water, ice, road salt tracked in by vehicles, and constant compression.

Uneven floors make the problem worse. A slab that has settled or a driveway apron that slopes can leave a persistent gap on one side even when the seal itself is intact.

Replacement includes inspecting the retainer, choosing a seal profile suited to the floor condition, and confirming that the door's closing position lets the seal compress evenly without over-compressing and holding the door up.

Common signs

Water running under the closed door
A visible gap at the floor line
The seal is flattened, torn or missing sections
Snow or leaves collecting inside the door
The seal freezes to the floor in winter
Rodents or insects entering under the door

Common causes

Compression set from years of closing
Ice bonding the seal to the slab and tearing it
Road salt and moisture degrading the material
An uneven or settled garage floor
A damaged or corroded retainer
Opener down-limit set too high or too low

Our inspection

Inspect the seal and retainer along the full width
Check the floor for slope, settling or damage
Verify the door closes level to the floor
Check opener down-limit setting
Inspect the bottom section for damage
Review threshold options if the floor is uneven

The process

Measure width and identify the retainer profile
Remove the old seal and clean the retainer
Repair or replace a damaged retainer
Install the correct seal profile
Adjust the opener down-limit for even compression
Test closing and confirm the gap is sealed

Risks of delaying service

Water intrusion damages stored items and promotes rust
Ice under the door can prevent full closing
Salt-laden moisture accelerates hardware corrosion
Gaps invite pests into the garage

Related components

Bottom seal / astragal
Bottom retainer
Bottom section and brackets
Threshold seal
Opener down-limit setting

Where this service applies

Residential garages, especially those with sloped or settled slabs or doors exposed to standing water.

Frequently asked questions

Why does water still come in with a new bottom seal?: Usually the floor is uneven or slopes toward the garage. A different seal profile or a floor threshold is often the fix.
Can the bottom seal freeze to the floor?: Yes, and forcing the opener can tear the seal or strain the door. Freeing the ice first and replacing a damaged seal is the correct approach.
Is the bottom seal the same as the weather stripping on the sides?: No. The bottom seal sits in a retainer on the door itself; perimeter weather seal attaches to the jambs and header.