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Garage Door Weather Seal Failure
in Colorado Springs, CO
Garage door weather seals are the rubber and vinyl strips along the bottom, sides, and top of the door that block outside air, water, and pests. Colorado Springs winters regularly hit single digits and below zero, and that extreme cold makes rubber crack and harden faster than in warmer climates. Once the seals fail, a garage can lose heat quickly, and ground-floor living spaces above attached garages feel noticeably colder.
Quick Answer
Weather seal failure means the rubber or vinyl strips around your garage door have cracked, shrunk, or fallen off. In Colorado Springs, winter temperatures below zero degrees Fahrenheit make rubber seals brittle and crack within a few seasons. A technician replaces the bottom seal and the side and top stop molding. Fix this before winter because a failed seal adds real money to heating costs and lets mice and insects in.
Telltale Signs
Warning Signs to Watch For
- Daylight is visible around the edges or bottom of the closed door
- Wind blows through the garage even with the door fully closed
- Snow or water gets under the door after storms
- Insects or mice have entered the garage with no obvious open entry point
- The rubber strip along the bottom of the door is visibly cracked, flat, or missing pieces
- The garage is noticeably colder than last winter with the door closed
Root Causes
What Causes Garage Door Weather Seal Failure?
Cold-Weather Rubber Deterioration
Standard rubber bottom seals are rated for temperatures down to about minus 20 degrees Fahrenheit, but they become stiff and brittle long before that point. Colorado Springs temperatures drop below zero several times each winter in areas like Black Forest and Monument, and a seal that freezes solid and then thaws repeatedly cracks within two to three seasons.
The Fix
Cold-Rated Bottom Seal Replacement
A technician removes the old seal and installs a cold-weather-rated vinyl or EPDM rubber seal that stays flexible below zero. The new seal is cut to the exact door width and pressed into the retainer track along the bottom rail.
UV Degradation of Side and Top Seals
Colorado Springs receives intense ultraviolet radiation at 6,000 feet elevation, more than cities at lower altitudes. The side and top stop molding around the door frame takes direct sun exposure and breaks down faster here than it would along the Front Range at a lower elevation. The foam and vinyl in these strips becomes dry and compressed within five to eight years.
The Fix
Stop Molding Replacement
A technician pulls off the old stop molding along the door frame and installs UV-stabilized replacement strips. The new molding is nailed into the frame at close intervals so it compresses evenly against the door panels when closed.
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-Weather Rubber Deterioration | UV Degradation of Side and Top Seals |
|---|---|---|
| Bottom seal is visibly cracked or missing sections | ||
| Light or air comes through the sides or top but not the bottom | ||
| Seal failure got noticeably worse after last winter | ||
| Side and top strips are discolored, chalky, or crumbling | ||
| Water puddles inside the garage near the door after rain or snowmelt |
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