2026-04-29 7 min read
In our years serving New London, we've seen this problem again and again: homeowners ignore a worn bottom seal or cracked threshold until their heating bill spikes and cold air pours into the garage. Weather stripping and seals are small components that make a massive difference. When they fail, you lose energy, invite pests, and risk water damage. The good news? Replacing them is affordable, fast, and one of the smartest maintenance moves you can make.
Our coastal climate doesn't help. Salt air off Long Island Sound corrodes metal fasteners. Winter freeze-thaw cycles crack rubber. UV exposure from our sunny springs and summers breaks down elastomers faster than you'd think. Add seasonal humidity swings, and your garage door seals are under constant stress.
The bottom seal takes the hardest hits. It flexes every time the door opens and closes.thousands of times a year. Most rubber seals last 5 to 7 years before they lose their compression and stop blocking drafts effectively. If you've had your door for a decade or longer without touching the seals, they're almost certainly compromised.
The threshold.that horizontal piece at the base where the seal sits.also deteriorates. Water pools there. Dirt accumulates. The rubber hardens. Before long, gaps open up, and cold air streams in.
Look for these red flags:
Visible cracks or tears in the rubber. Hold your hand near the bottom seal on a windy day.you'll feel the draft immediately if there's damage.
Light showing under the door. Close your garage door on a sunny afternoon. If daylight peeks through, your seal isn't making full contact.
Water pooling or staining along the garage floor near the door after rain. That's a threshold or bottom seal failure.
Rodents or insects getting into your garage. Tiny gaps are highways for pests. If you've noticed this, your seals need attention now.
Higher heating or cooling costs with no other explanation. A compromised seal forces your HVAC to work overtime.
**Need weather stripping & seals in New London today?** Call (860) 351-1666. we cover same-day service across the area.
Weather stripping comes in a few varieties. Standard rubber bottom seals are the most common and affordable.typically $150 to $300 installed, depending on your door width. High-performance vinyl or EPDM seals cost a bit more but last longer and handle our New England winters better.
Threshold replacement is separate. If the aluminum or steel threshold is bent, cracked, or rusted, we'll swap it out. Budget $200 to $400 for that job. Sometimes we can save the threshold and just replace the seal; that drops your cost significantly.
The best move? Get a free estimate. We'll inspect your entire seal system.top, sides, bottom, and threshold.and tell you exactly what needs replacing. No surprises. Many homeowners are shocked at how affordable this is compared to the energy savings they see within weeks.
For a deeper look at how our coastal environment impacts your door, check out our guide on salt air damage. Winter stress is another factor; we've covered spring failures and seasonal prep in detail too.
You can replace some seals yourself if you're handy. Bottom seals usually slide into a track, and the job takes an hour. But here's what I've learned in 15 years on the trucks: doing it wrong costs more than hiring us the first time. Improper installation leaves gaps. Misaligned seals wear unevenly and fail fast. Threshold work requires precision tools and knowledge of your specific door model.
If you're confident with basic tools and your door is standard, try it. But if you're unsure, call us. A botched seal job lets drafts right back in, defeating the whole purpose. Professional installation means the seal compresses evenly, the threshold sits flush, and everything seals tight.
New seals aren't maintenance-free. Twice a year, clean the seal and threshold with a soft brush to remove dirt and salt residue. Wipe them dry. In winter, check after heavy snow.ice buildup can damage a new seal if you're not careful.
Most seals will last 5 to 7 years with regular care. Mark your calendar and plan ahead rather than waiting for failure.
Drafts and energy loss start small, but they compound. A worn seal costs you money every single day. The fix is simple, affordable, and often available same-day near you.
Contact New London Garage Doors at (860) 351-1666 or visit our contact page to schedule your free seal inspection. We'll give you a clear estimate and honest advice on what your door needs.
Don't wait for winter or summer to hit hard. Call today.
How long do garage door seals last? Most rubber bottom seals last 5 to 7 years with normal use. Coastal New London environments and freeze-thaw cycles can shorten that lifespan. We recommend inspecting them annually and replacing when you see cracks or light showing under the door.
Can I replace the bottom seal myself? Many homeowners can handle it if they're comfortable with basic tools. The seal usually slides into a track. But misalignment is common, leading to uneven wear. Professional installation ensures a tight, long-lasting fit and saves frustration.
What does a weather stripping replacement cost? A bottom seal replacement typically runs $150 to $300 installed. A new threshold adds $200 to $400. Prices vary by door size and material. Request a free estimate.we'll inspect your entire seal system and quote the exact work needed.
How do I know if my seals are bad? Look for visible cracks, light showing under the closed door, water pooling on the garage floor, drafts you can feel, or unexplained increases in heating and cooling costs. Any of these signals it's time to replace.
Do weather seals help with energy efficiency? Absolutely. A worn seal can cost you hundreds in wasted heating and cooling energy each year. New seals pay for themselves quickly, especially in New London's variable climate, and keep pests and moisture out too.