2026-05-15 7 min read
In our 15 years serving Gresham homeowners, we've seen this problem again and again: a deteriorating bottom seal that leaks air, water, and invites unwanted guests into the garage. Your garage door's bottom seal (also called the threshold) is the workhorse of your door system, taking the brunt of weather, temperature swings, and daily wear. When it fails, your heating and cooling bills climb, and drafts become impossible to ignore. The good news? Replacing it is straightforward, affordable, and something we handle on same-day calls across the Portland metro.
That rubber strip at the base of your garage door does heavy lifting. It blocks rain, snow, and wind. It seals out drafts that make your garage and adjacent living spaces harder to heat or cool. It keeps insects, rodents, and moisture from creeping underneath. In Gresham's wet climate, a failing seal becomes a liability fast. Water pools behind the threshold, rusts the bottom panel, and can eventually damage your foundation if the problem spreads.
The bottom seal also works with the side seals and weather stripping to create a complete thermal envelope. If the bottom fails, your insulated garage door loses much of its benefit. Even if you've invested in a quality door, a worn seal undermines that investment.
Look for these red flags during your next walk around the garage:
Visible cracks or tears. Rubber hardens over time, especially in Oregon's freeze-thaw cycles. If you see chunks missing or deep splits, replacement is overdue.
Light coming through. Close the door on a sunny day. Stand inside and look at the base. Daylight means drafts and moisture are getting in.
Water pooling or staining. After rain, check the concrete just inside the door. Stains or standing water point to a failed seal.
Increased energy bills. A sudden jump in heating costs in winter (or cooling in summer) often traces back to an air leak at the bottom.
Pest evidence. Finding spider webs, insect trails, or rodent droppings near the garage floor is a sign the seal isn't sealing.
If you're unsure, our team can assess your door during a free garage door maintenance consultation. We'll identify whether it's the bottom seal, the side seals, or the whole weather stripping system that needs work.
**Need weather stripping & seals in Gresham today?** Call (541) 834-9982. we cover same-day service across the area.
A quality bottom seal typically lasts 5 to 7 years under normal conditions. In Gresham, where we deal with rain nine months a year, you might see wear sooner. Harsh winters and UV exposure accelerate breakdown. If your door is older than seven years and you've never had the seal replaced, now is the time.
Replacing the seal before it fails beats paying for water damage or energy waste. Preventive maintenance always costs less than reactive repairs. We recommend checking your seal every spring as part of your seasonal routine. Our spring maintenance checklist walks you through what to inspect.
Here's what matters: the cost is modest, and the work is quick. A bottom seal replacement typically runs between $150 and $300, depending on your door size and seal type. Most jobs take under an hour. If you need other weather stripping or seal work, we can bundle it and give you a single estimate.
We offer same-day estimates and can often complete the work the same day you call. There's no reason to live with a drafty, leaking garage door in Gresham when the fix is this affordable and fast. Schedule a free quote by phone or online, and we'll tell you exactly what you're looking at before we touch anything.
Some homeowners tackle seal replacement themselves. If you're handy and confident, it's doable. You'll need a new seal kit (around $30 to $80), a screwdriver, and about an hour.
But here's the catch: if the seal is stuck or the track is damaged, the job gets messy fast. A professional ensures the new seal is installed flush, the track is clean, and everything lines up perfectly. Improper installation can leave gaps that defeat the whole purpose. Our team handles the details so you don't have to fret about whether it's done right.
Your garage door is one of your home's largest moving parts. Proper weather stripping and seals keep it working longer and your home more comfortable. Don't ignore a worn bottom seal. The cost of replacement is nothing compared to water damage, higher utilities, or a compromised door system down the road.
If you live in Gresham or nearby areas like Troutdale, Fairview, or east Portland, Garage Door Gresham is ready to help. Call (541) 834-9982 to get a same-day estimate on weather stripping and seal replacement. We'll make sure your garage door seals tight again.
How do I know if it's the bottom seal or something else causing drafts? Close the door and run your hand along the bottom on a breezy day. You'll feel air movement if the seal is bad. Visual cracks or chunks missing confirm it. If the sides also leak, the entire weather stripping system may need attention.
Can I replace just the bottom seal, or do I need to replace side seals too? You can replace just the bottom seal if that's the only failed component. However, if the side seals are also worn, we recommend doing them together for complete protection and better energy efficiency.
How long does a replacement take? Most bottom seal replacements take 30 minutes to an hour. Scheduling is fast. Many of our Gresham customers get same-day service when they call in the morning.
Will a new seal help my heating bills? Yes. A worn seal allows heated air to escape and cold air to infiltrate. Replacing it reduces that loss, especially important in winter months when energy costs spike across Oregon.
What type of seal should I use? The best choice depends on your door type and local climate. We stock rubber, vinyl, and composite seals. Our team recommends the right material during your estimate, ensuring durability in Gresham's wet conditions.