Full 25-point door and opener safety check with every visit - springs, cables, rollers, tracks, and your LiftMaster or Chamberlain opener included
You get a price before we start. It does not change when the truck arrives.
Clopay Weather Seal Replacement: The Thornton Owner’s Guide
We replace Clopay weather seals in Thornton for $110 to $275 installed, depending on the door width, seal profile, and whether the retainer channel needs replacement too. Most Clopay bottom seals we swap the same day the call comes in, because we keep common Clopay profiles on the truck. The way most homeowners discover the seal has failed is a strip of daylight along the garage floor, a puddle that shouldn’t be there after a spring snowmelt, or the distinct smell of a garage that’s been breathing outside air all winter.
A failed weather seal isn’t cosmetic. In Thornton’s freeze-thaw cycle, water that gets under the door and refreezes will eventually pull the seal loose from its retainer or warp the aluminum channel. Marcus Deller has pulled bottom seals off doors where the rubber had hardened into something closer to plastic than polymer, after a few Colorado winters did what a hammer never could.
Which Clopay Models This Applies To
Clopay uses three main bottom seal profiles: a T-style (seen on most steel residential doors), a bulb-style round seal, and a flat lip seal on some older wood and carriage-house lines. The T-style fits doors across the Classic, Gallery, and Coachman series; the bulb profile shows up on some Bridgeport and Value Plus models. The retainer width is the detail that matters. Clopay retainers are commonly 1/4 inch, 3/16 inch, or 1/8 inch, and if you order the wrong width it either won’t seat or it slides out the first time the door cycles. We measure the channel with calipers before quoting, never by eye.
OEM Clopay seals are good rubber, but there are quality aftermarket equivalents (Baldwin, Action Industries) that match Clopay’s dimensions and hold up as well for $10 to $25 less. If the door is under warranty and the seal failed early, we’ll recommend OEM to keep the claim clean. Clopay’s part number on the packaging often begins with a series code, and there’s a label on the interior left door panel for roll-up doors made after 2012 that includes the model series, which tells us the correct seal profile without guesswork. Servo Garage Doors Thornton is an independent service provider, not affiliated with Clopay; we work with Clopay doors daily because Thornton has a lot of them, especially in the newer builds east of I-25.
Signs Your Clopay Weather Seal Replacement Is Failing

- Visible daylight under the door: The seal has compressed, torn, or pulled out of the retainer at one end. If the door was installed before 2019, the rubber has likely lost rebound and won’t recover, even after adjusting the travel limits.
- Water pooling along the inside floor edge: In Thornton, spring snowmelt and summer storm runoff test a bottom seal more than anything else. Water doesn’t just sit there; it wicks into drywall at the base and rusts track brackets over time.
- Draft or temperature difference near the floor: A seal that’s cracked but not obviously missing still lets air move. You’ll feel it in January before you’ll see it.
- Rodent activity or leaf debris inside: Mice need less than half an inch to get through. If you’re seeing droppings along the garage walls, check the bottom seal and the lower side seals; that’s usually the door.
- Seal pulling away from one end or stubbornly folding during operation: That’s a torn T-channel or a bent aluminum retainer, common after a car tire bumps the threshold repeatedly or ice freezes the seal to the concrete and rips it when the door opens.
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AfterReplacement Cost & What’s Included
For Clopay weather seal replacement in Thornton, installed pricing breaks down like this:
- Bottom seal only (standard T-style, single door): $110 to $160
- Bottom seal with retainer replacement: $160 to $225
- Bottom seal plus side and top perimeter seals: $225 to $275
- Service call, if nothing else is needed: waived with any completed repair
The range accounts for door width (a 16-foot Clopay takes a longer length than a 9-foot), the profile type, and whether the aluminum retainer is reusable. Parts cost $25 to $70 at the top, and then it’s labor, which is straight work: pulled door, old seal out, channel cleaned, new seal seated, travel limits rechecked, and a full cycle test. We photograph the failed seal before we quote, and then again after it’s done. That’s Clause 4 of The Haven Standard: the customer sees the failed part before anyone asks for a signature. You get a flat, written price and written scope before work starts, and the seal work is covered under the 365-Day Done Right Promise. If a seal we installed pulls loose or tears prematurely within the year, we come back and make it right, documented.
DIY or Call Us?

Replacing a bottom seal is one of the few garage door tasks a careful homeowner can do safely; there’s no high-tension hardware involved once the door is fully open and the opener is disengaged. The places where DIY goes wrong are measurement and fit: getting the T-width wrong, buying a universal seal that doesn’t match Clopay’s channel, or cutting it short at the ends (they shrink in cold weather and will pull in from the corners after the first December). The side and top perimeter seals are finicky too; old nails and dried adhesive make them a slower job than you’d expect.
If you want the right part matched to the model the first time, with a photo record and a written price before the work starts, call us at (720) 575-1024. We have common Clopay profiles stocked on the truck in Thornton, and we’ll measure the retainer channel before quoting anything.
FAQs
On a south- or west-facing Thornton garage, expect four to six years. UV takes rubber out faster than cold; a north-facing door on a shaded lot can go seven or eight. We also replace seals for other brands: Chamberlain, LiftMaster, and Genie openers sit on plenty of doors we service, and we stock parts for them too.
No. Once the rubber tears away from the T-channel or cracks through, it doesn’t glue or patch; it gets replaced. The good news is that a bottom seal is inexpensive and the swap is usually under an hour. Call (720) 575-1024 for an exact quote on your door; estimates are free.
For a standard 9-foot or 16-foot door, we’re done in 45 to 90 minutes. Side and top perimeter seals add 30 to 60 minutes depending on how the old ones come off. We photograph what we found and what we replaced on every visit, and Marcus Deller will name the part and the price before we touch anything; that’s the order it goes.
We stock common Clopay profiles T-style 1/4 inch, 3/16 inch, 1/8 inch, and bulb styles on the truck and at the Thornton shop, so most seals go in same day. If it’s an unusual profile or a wide custom door, it’s ordered and installed within a week. Call (720) 575-1024 and we’ll tell you over the phone whether we have your profile on hand.
Name the part, quote the price, then do the work - in that order. Servo Garage Doors Thornton runs on that rule. If your Clopay seal is shot and you want a flat, written price with a documented record of what changed, call (720) 575-1024 and talk to a real person, day or night. The quote is written before work starts; the photo record is yours when we leave. That’s The Haven Standard, and it’s been the way we work on garage doors in Thornton since 2015.
Written by Marcus Deller, Owner & Lead Technician, Servo Garage Doors Thornton at Servo Garage Doors Thornton, serving Thornton and nearby areas.






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