2026-09-07 7 min read A2Z Garage Doors
A customer called last Tuesday complaining that her garage felt like a walk-in freezer, even with the door closed. After 15 years in this business, I knew exactly what was happening: her bottom seal had deteriorated, and cold air was pouring in underneath. Weather stripping and seals in Redwood City fail for a simple reason.our coastal marine layer, fog, and temperature swings wear them out faster than most people expect. The good news? This is one of the easiest and most cost-effective repairs we do.
The bottom seal takes the worst beating. Every time your garage door cycles up and down, that rubber strip compresses and flexes. Add Redwood City's moisture, salt air from the bay, and you've got a recipe for premature degradation. Most seals last between four and six years before they crack, harden, or crack at the corners. The threshold (the metal track your bottom seal rides in) can also shift or rust over time, creating gaps that let drafts slip right through.
I've also noticed that homeowners often don't realize how much air loss happens at the sides. The side seals rarely get attention until a draft becomes obvious, but by then, you're already bleeding energy. A small gap here and there might seem harmless, but it adds up fast.
Look for visible cracks, chunks missing from the rubber, or hardened, brittle material. If you see daylight coming through at the bottom or sides, that's a draft waiting to happen. Another telltale sign: your garage temperature drops significantly during winter or your heating bill spikes without explanation. Sometimes the bottom seal just sits too high in the threshold, leaving a gap underneath that pulls cold air in constantly.
Here's something most people miss: if your door doesn't seal completely when it closes, or if it bounces slightly, the seal might be compressed unevenly. That's a job for a professional to diagnose, but it's worth scheduling a free quote to rule out a bigger issue.
**Need weather stripping and seals in Redwood City today?** Call (626) 507-4779. we cover same-day service across the area.
You can buy a replacement bottom seal at a hardware store for thirty to seventy dollars. Installation is straightforward if you're comfortable unscrewing the old seal track and sliding in a new one. However, if your threshold is bent, rusted, or the seal doesn't sit flush, a DIY fix won't hold. I've seen homeowners spend two hours wrestling with a misaligned track, only to have the seal fail again in months.
Our team at Garage Door Redwood City handles this in under an hour. We inspect the entire frame, adjust the threshold if needed, and install a seal that actually seals. The cost depends on which seals you need replaced (bottom, sides, or both), but our pricing guide covers what affects your estimate. Same-day appointments are available most days.
If you're already thinking about insulation, seals should come first. An insulated door without proper seals is like insulating your walls but leaving the windows open. The two work together. Your garage might not be heated, but a poorly sealed door lets conditioned air escape from your home during winter. In summer, it lets heat and humidity in, making your AC work harder.
For more on how insulation and seals complement each other, check out whether your garage door needs insulation. Many homeowners bundle both projects and see noticeable energy savings within the first month.
A basic bottom seal replacement typically runs between one hundred fifty and three hundred dollars, depending on whether your threshold needs adjustment or if side seals are involved. It's one of the cheapest preventive maintenance you can do. Left unaddressed, a failing seal can lead to moisture damage inside your garage, rust on your door panels, and higher utility bills all year. See what really drives your repair costs to understand the full picture.
If you're noticing drafts or visible wear on your seals, don't wait for winter to get worse or summer cooling costs to spike. Call us at (626) 507-4779 or get a same-day estimate online. We'll inspect your door, identify exactly which seals have failed, and handle the replacement on your schedule. Many customers see us out and back in an hour, and the draft stops immediately.
Redwood City homeowners deserve a garage that actually seals against the elements. Let's fix yours today.
How often should I replace garage door weather stripping? Most seals last four to six years in Redwood City's coastal climate. If you notice cracking, hardening, or visible daylight, replace them sooner. Check annually during spring maintenance.
Can I reuse my old threshold when installing new seals? Only if it's straight, rust-free, and sits flush with your door panels. Bent or corroded thresholds should be replaced to ensure your new seal performs correctly and lasts longer.
Will new seals alone reduce my heating bill? Yes, significantly. Proper seals stop drafts that leak conditioned air. Combined with insulation, savings can reach ten to fifteen percent on monthly utility costs during cold months.
What's the difference between a bottom seal and side seals? Bottom seals run the full width of the door and take the most impact. Side seals line the vertical tracks. Both are important, but bottom seals fail first and warrant priority replacement.
How do I know if my seal is actually failing or just dirty? Clean it first with a damp cloth. If it's still hard, cracked, or doesn't spring back when pressed, replacement is needed. Dirt and grime alone won't cause drafts; deteriorated rubber will.