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Garage Door Bottom Seal Worn Out
in Rochester, NY
The bottom seal is the rubber or vinyl strip that presses against the garage floor when the door is closed. In Rochester, that seal is up against snow and ice from November through April, and it hardens and cracks faster than it would in a warmer place. Once it's gone, you're heating the outdoors, and water and mice find their way in.
Quick Answer
The rubber seal along the bottom of a garage door keeps out water, cold air, and pests. In Rochester, that seal takes a beating from six months of snow, ice, and road salt tracked in by vehicles. When it cracks or tears, cold air and water get under the door. Replacing the seal is straightforward, but it should match the floor surface and door width. Call (585) 514-4736 before winter sets in to avoid water damage to stored items.
Telltale Signs
Warning Signs to Watch For
- Cold air blows in along the bottom of the door even when it's fully closed
- Water puddles on the garage floor near the door after rain or snowmelt
- Daylight is visible under the door when you look from inside
- The rubber strip along the door bottom is cracked, torn, or missing pieces
- Mouse droppings or signs of pests near the bottom of the door
- Frost or ice forms on the inside of the door at floor level in winter
Root Causes
What Causes Garage Door Bottom Seal Worn Out?
Cold and UV Damage to Rubber
Standard rubber bottom seals crack when they spend years cycling between Rochester's sub-zero January nights and summer heat. The rubber gets stiff, loses its flexibility, and splits. Once it splits, it no longer presses flat against the floor.
The Fix
Bottom Seal Replacement
A new seal is cut to fit the width of the door and pressed or screwed into the retainer channel at the door's base. A vinyl or EPDM seal holds up better than standard rubber in cold climates.
Uneven or Damaged Garage Floor
Rochester's freeze-thaw cycles crack and heave concrete garage floors over time. An uneven floor means the bottom seal can only contact the high spots, leaving gaps at the low spots where water and air get through even when the seal itself is still in decent shape.
The Fix
Seal Replacement With Threshold Bar
A technician installs a new bottom seal along with a threshold bar that attaches to the floor and fills in the low spots. Together, they create a complete seal against an uneven surface.
Self-Diagnosis
Which Cause Applies to You?
Check the signs you're observing to narrow down the likely root cause before your inspection.
| What You're Seeing | Cold and UV Damage to Rubber | Uneven or Damaged Garage Floor |
|---|---|---|
| Seal is visibly cracked or has pieces missing | ||
| Gaps appear only in certain spots along the door bottom | ||
| Water comes in at a low point in the floor near the door | ||
| Seal is intact but cold air still gets in everywhere | ||
| Seal hardens and stops flexing in winter |
Free Inspection
Get a Diagnosis in Rochester
An on-site inspection is the only way to confirm which cause applies to your property. Free, no obligation.
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