Weatherstripping & Sealing
Keep cold air out and energy costs down with new weatherstripping
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Detroit winters don't leave much room for gaps. When your garage door weatherstripping wears out, cold air moves in fast, and in an attached garage that means your heating bill goes up and your car starts cold on mornings when it doesn't need to. We replace bottom seals, side seals, and threshold seals across Metro Detroit for $100-250, usually in under an hour. We use freeze-resistant material that won't crack and stiffen in sub-zero temperatures the way standard rubber does. If you want to understand why insulation and sealing matter in Michigan, that piece covers it well.
Michigan winters expose every gap
The average Detroit garage door seal lasts about five years. After that, the rubber starts cracking, pulling away from the door, and losing its compression. In summer you might not notice. In January, when it's single digits outside, you feel it immediately.
Standard rubber seals are rated for temperatures down to about 20 degrees Fahrenheit. Detroit regularly hits below zero. We only install freeze-resistant EPDM and vinyl materials that stay flexible down to -40 degrees, so the seal actually does its job on the worst mornings.
If you're also thinking about heat retention in the garage itself, pairing new seals with garage door insulation makes a meaningful difference. But the seals come first -- insulation doesn't help much when cold air is pouring in around the edges.
Where each seal goes
A garage door has three distinct sealing points. Most worn doors are failing at all three, but it's common for one to go first. Here's what each seal does and where it sits.
Bottom seal
Side view -- seal at floor contact
A thick rubber or vinyl strip attached to the bottom edge of the door. It compresses against the floor when the door closes, blocking cold air, snow, and water from coming in under the door. This is the seal that wears fastest.
Side seals
Top view -- seal along vertical edge
Vertical strips that run along both sides of the door frame, filling the gap between the door panel and the rough opening. Side seals wear unevenly -- one side often goes before the other depending on how the door is hung.
Threshold seal
Side view -- aluminum track on floor
An aluminum or rubber track bonded to the garage floor. The door closes into it rather than onto an uneven concrete surface. Especially useful on older slabs where the floor has settled and the bottom seal alone can't bridge the gap.
Signs you need new weatherstripping
Worn seals don't always fail in an obvious way. Sometimes it's a gradual thing you get used to -- until you notice your heating bill creeping up or find a mouse in the garage. If you're seeing any of these, it's time to schedule a replacement before winter hits.
Cold drafts at floor level
If you can feel cold air moving across the garage floor near the door, the bottom seal has lost its compression. In an attached garage, that cold air moves into the house. A new bottom seal fixes this in about 30 minutes.
Water intrusion after rain or snowmelt
A thin line of water along the base of a closed door means the bottom seal isn't making contact with the floor consistently. Left alone, standing water leads to rust on the door panels and damage to anything stored low in the garage.
Visible daylight around the door edges
Close the garage door and turn off the interior lights. If you can see daylight around the sides or bottom, your seals are gone. Anywhere light gets in, cold air does too. This is the simplest test you can do yourself.
Pest entry through the door gap
Mice can squeeze through a gap smaller than a dime. A worn bottom seal creates exactly that kind of opening. If you've found evidence of rodents in the garage, check the seal -- it's usually the entry point. A solid threshold seal combined with a new bottom seal closes that gap for good.
Materials we use
Not all weatherstripping material handles Michigan winters the same way. Standard rubber sold at hardware stores is fine down to about 20 degrees -- that's not cold enough for Detroit. We carry materials rated for genuine sub-zero conditions.
EPDM rubber
Our standard material for bottom and side seals. Stays flexible to -40 degrees, resists UV degradation, and compresses well without tearing. Lasts 7-10 years in typical Metro Detroit conditions.
Best for: most residential doors
Vinyl bulb seal
The T-slot bulb design creates a better floor seal than flat rubber on uneven concrete slabs -- very common in older Detroit homes. Resists ice bonding, so the door doesn't freeze shut in January.
Best for: older homes with settled floors
Aluminum threshold
A floor-mounted aluminum extrusion with a rubber insert. Handles floors that have heaved or settled beyond what a door seal alone can bridge. Installs in about 20 minutes, lasts indefinitely.
Best for: floors with significant gaps or slope
If you're deciding between weatherstripping and a full insulation upgrade, our blog post on garage door insulation R-values in Michigan gives you a straightforward comparison. For a full-service maintenance visit that includes a seal check, see our maintenance page.
Pricing
Most weatherstripping jobs fall between $100 and $250 depending on which seals need replacing and the material you choose. A single bottom seal is on the lower end. Full replacement of all three sealing points with a threshold installation is on the higher end. We give you the number upfront before starting.
Bottom seal only
$100-$140
Standard single-car door. EPDM or vinyl bulb. Includes removal of old seal and hardware.
Bottom + side seals
$150-$200
Full perimeter sealing. Most common package for drafty doors. About 45 minutes on-site.
Full seal + threshold
$175-$250
All three sealing points plus aluminum threshold installation. Best cold-weather package.
Ready to stop the drafts?
Most jobs done same-day. Get a free quote online or call now.
Frequently Asked Questions
Common questions about garage door services in Detroit. Can't find your answer? Call us at (313) 555-0313.
What Detroit Says About Us
"313 Garage Door came out same day when my spring broke. The technician was professional, explained everything clearly, and had me back up and running in under an hour. Excellent service!"
Michael Johnson
Detroit
"We needed a new garage door for our home. The team helped us choose the perfect style, installed it quickly, and cleaned up everything afterward. Couldn't be happier with the result!"
Sarah Williams
Livonia
"Emergency service at 2 AM when our door wouldn't close. They arrived within 30 minutes and fixed the issue. True professionals who care about their customers."
Robert Chen
Dearborn
"Had our garage door opener replaced with a smart opener. The installation was seamless and the new features are amazing. Great value for the money."
Jennifer Martinez
Warren
"Regular maintenance service keeps our door running smoothly. The technician is always thorough and catches small issues before they become big problems."
David Thompson
Sterling Heights
"Fast, friendly, and fair pricing. They repaired our commercial door at the warehouse quickly and got us back in business. Highly recommend!"
Lisa Anderson
Troy
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