2026-05-20 7 min read
A customer called last Tuesday complaining her garage felt like an oven in the afternoon. When I arrived, I found the bottom seal completely deteriorated, letting hot air pour in around the threshold. Weather stripping and seals in Newport Beach fail faster than most places because of salt air, UV exposure, and our temperature swings. The good news: this is one of the easiest, most affordable fixes we do, and it makes a real difference.
Our coastal climate is brutal on rubber and foam. Salt spray corrodes metal components. UV rays harden and crack weatherstripping within 4 to 6 years instead of the 7 to 10 you'd get inland. Temperature swings from 55 degrees at sunrise to 85 degrees by afternoon stress the material constantly.
The bottom seal takes the worst beating. It sits inches from the driveway where salt residue accumulates, water pools during winter, and heat radiates up in summer. Most homeowners don't notice the deterioration until air is already leaking through.
When seals fail, you're looking at energy loss, dust and salt getting into your garage, and potential water intrusion during our rare heavy rains. If you've got a garage workshop or finished space above, a bad draft also affects your home's climate control and utility bills.
The bottom seal is the first line of defense. It's a rubber or silicone strip that creates a barrier between the door and the driveway. Over time, it compresses, cracks, or splits. You'll notice daylight under the door, or feel a draft when the door is closed.
The threshold, which runs along the bottom of the frame, can also warp or deteriorate. If the threshold is damaged, no amount of new sealing will stop the draft completely. That's why I always inspect both during a service call.
Side and top seals wear too, but more slowly. They're not exposed to the same level of moisture and salt spray. Still, if you're getting a draft from the sides or top, replacement is straightforward and inexpensive.
Bottom seal replacement typically runs $150 to $300 depending on your door size and whether the threshold needs work. If you need side and top seals as well, budget another $100 to $150 combined. Compare that to the cost of higher energy bills over a year or two, and the ROI is immediate.
We offer free estimates for weather stripping and seals work. I'll inspect the entire door perimeter, identify what's failed, and give you a clear cost before we start anything. Many of our same-day appointments for seal replacement finish before lunch.
**Need weather stripping & seals in Newport Beach today?** Call 949-739-8011. we cover same-day service across the area.
You can buy a bottom seal kit online for $30 to $60 and install it yourself. The process involves removing the old seal, cleaning the channel, and sliding the new one in. It's not difficult if your door is older and the seal pulls out cleanly.
The problem: if your threshold is damaged, warped, or if the channel is corroded, a new seal won't seat properly and the draft persists. Professional technicians have the tools to straighten channels, clean corroded metal, and ensure the new seal compresses evenly across the full width. If you've already got heat and drafts, it's worth getting it right the first time.
For more on keeping your whole door in shape, check out our complete garage door maintenance checklist to keep your door running smoothly. Seals are one piece of the puzzle; springs, openers, and hinges all matter too.
Spring and early summer are ideal. You'll spot damage before the heat peaks, and you'll feel the benefit immediately. If you notice daylight or drafts now in May, don't wait until August when your AC is working overtime.
If you had insulation work done recently, or if you're considering it, check our post on garage door insulation R-value in Newport Beach to understand how seals and insulation work together. Good seals are half the equation; insulation is the other half.
Salt air also accelerates corrosion of metal frames and hardware. If you live near the coast here in Newport Beach, read about how salt air destroys garage doors and what to do about it for a fuller picture of seasonal maintenance.
Don't let a failing seal waste energy or let salt air into your garage space. View our weather stripping and seal services or schedule a free quote with one of our technicians. We'll assess the damage, explain your options, and get you sealed up fast.
Call 949-739-8011 if you want to talk through the issue before booking. Most seal jobs are done within 24 hours of your call, and the payoff in comfort and energy savings is immediate.
How long do garage door weather seals last? In Newport Beach's coastal climate, bottom seals last 4 to 6 years due to salt spray and UV exposure. Side and top seals often last longer, 7 to 10 years. Regular inspection helps catch failure early before drafts become a problem.
Can I replace the bottom seal myself? Yes, if the channel is clean and undamaged. Remove the old seal, wipe the channel, and slide the new one in. If your threshold is warped or corroded, professional installation ensures proper compression and a true seal against drafts.
What does a draft under the garage door cost to fix? A bottom seal replacement runs $150 to $300. If side or top seals also need work, add $100 to $150. Costs vary by door size. We provide free estimates before any work begins.
Why does my garage feel hot in summer even with the AC on? A failing bottom seal or damaged threshold lets hot air in around the driveway and prevents cold air from staying inside. Sealing that gap makes a noticeable difference in temperature and energy bills within days.
Do I need new seals if I just had my door installed? Not immediately. New doors come with factory seals. However, if your door is more than 5 years old, seals are worth inspecting during routine maintenance to catch deterioration before it becomes a draft problem.