2026-09-08 7 min read A2Z Garage Doors
A customer called last Tuesday complaining his garage felt like a freezer. Turns out his bottom seal was completely cracked. Weather stripping and seals in Redwood City aren't glamorous, but they're the difference between a sealed garage and one that bleeds heating costs all winter. If you're noticing drafts around your garage door, you need attention now, not in December.
Most homeowners don't think about weather stripping until they feel cold air pouring in. Your garage door has three main seal points: the bottom seal that sits on the threshold, the side seals running up both jambs, and the top seal. All three work together to create an air barrier.
When these fail, your HVAC system works overtime. In Redwood City's mild climate, people often underestimate this problem. A single cracked bottom seal can increase your energy costs by 10 to 15 percent if your garage connects to living space. That draft doesn't just waste money. It lets pests inside, reduces insulation value, and can damage stored items sensitive to temperature swings.
The bottom seal isn't just about warmth. It keeps moisture out during our wet months and prevents critters from finding shelter under your door. Rodents and insects see a gap as an invitation.
Your side seals and top seal also manage water intrusion. During rain, water can run down the door panels and seep through gaps if seals are missing or compressed. Over time, this moisture can rot wood frames and cause rust on metal components. A proper seal system is your first line of defense against water damage that costs far more to fix than preventive maintenance.
I've seen customers in the Bay Area ignore small seal gaps for months, then face structural damage worth thousands. It happens fast in our wet season.
Look for these red flags. If you see daylight around the door frame when it's closed, your seals are gone. Feel around the threshold with your hand. A cracked or compressed bottom seal will feel hard and brittle, not firm and flexible. If the rubber peels away from the metal or wood, it's time to replace it.
Drafts that whistle are another clear signal. Cold air moving through gaps creates that sound. You might also notice increased pest activity, water stains on the concrete floor inside, or condensation on windows that face the garage. These all point to failed seals.
Check your seals every fall. It takes two minutes and saves thousands in preventive costs.
**Need weather stripping & seals in Redwood City today?** Call (626) 507-4779. we cover same-day service across the area.
A bottom seal replacement typically runs between $150 and $300 depending on your door size and seal type. Side seals and top seals cost similar amounts. If you need all three replaced, expect a full estimate around $400 to $600. Our detailed cost guide covers pricing in detail if you want specifics before calling.
The good news: replacement takes less than an hour. We can schedule same-day service for most Redwood City homes. You don't need a new door or major work. Just fresh seals installed properly.
Materials matter too. Cheap rubber seals compress within a year. Quality EPDM rubber or vinyl stays pliable for 5 to 7 years. When you get your free estimate, ask about seal material grades. It's a small investment that compounds over time.
If your garage is uninsulated, seals alone won't solve everything. But they're the foundation. Seals keep conditioned air in (or cold air out), while insulation slows heat transfer through the panels themselves. Think of seals as the gasket and insulation as the blanket. You need both for real energy savings.
We've written extensively about whether your garage needs insulation. Many customers in Redwood City benefit from combining new seals with panel insulation, especially if they use the garage as a workshop or fitness space.
Don't try to force old seals out or install new ones with caulk. The threshold and frame need proper preparation. Caulk is a bandage, not a seal. Professional installation ensures the seal sits flush and creates a real air barrier.
Garage Door Redwood City has handled thousands of seal replacements across the Peninsula. We know what works in our climate and what doesn't. When you're ready to stop feeling those drafts, call us to schedule a free quote. We'll inspect all three seal points and give you an honest estimate on the spot.
How long do garage door seals last? Quality seals last 5 to 7 years in normal conditions. Exposure to sun, extreme temperature swings, and salt air can shorten lifespan. We recommend checking annually and replacing when you see cracks or hardening.
Can I replace seals myself? It's possible, but difficult. The threshold must be clean and level. Improper installation leaves gaps. Professional installation ensures proper compression and alignment every time. The cost difference is minimal for the quality guarantee.
Do I need to replace my whole door to fix drafts? No. Seals are replaceable parts, just like springs or rollers. A new seal costs a fraction of a new door and solves the problem in most cases.
Will new seals reduce my energy bill? If your garage connects to heated living space, yes. Seals eliminate drafts that force your HVAC to work harder. Savings depend on your door size, insulation, and how much conditioned air currently escapes.
Do weatherstripping seals help with noise? Partly. Seals reduce air movement noise and vibration. For serious noise reduction, consider insulated panels alongside new seals.