2026-05-19 7 min read
A customer called last Tuesday with a simple question: "Why is my garage so cold in winter, and my AC bill skyrockets in summer?" We scheduled a free estimate and found the culprit immediately. Her bottom seal had cracked, and the threshold weatherstripping was missing entirely. She'd been losing conditioned air for months without realizing it. That conversation happens more often than you'd think here in Lakewood. Weather stripping and seals are unglamorous, but they're essential to keeping your garage comfortable and your energy costs reasonable.
Your garage door's weather stripping and seals work hard. They compress thousands of times per year. UV rays from our Southern California sun degrade rubber and vinyl faster than most homeowners expect. Temperature swings between hot days and cool nights cause expansion and contraction. Before long, the bottom seal cracks. The side seals shrink. Air leaks in and conditioned air leaks out.
Here's the real cost: a failing seal system lets drafts in year-round. In winter, your heating runs longer. In summer, your AC compensates for the loss. Over a single year, poor seals can add $200 to $400 to your energy bill. That's money leaving through gaps you can't even see.
The threshold is the horizontal seal at the base of the door. When it fails, water pools against your foundation during rain. Pests find entry points. The draft becomes noticeable when you're standing near the door. If you've got a garage that doubles as a workspace or storage area, a failing seal system makes the space feel uncomfortable and expensive to condition.
Look for these warning signs. Visible cracks in the rubber bottom seal are obvious. If you see daylight around the edges of the door when it's closed, you have a gap. Feel for drafts with your hand on a breezy day. Check the threshold for warping or separation from the door frame.
One telltale sign: moisture or water stains on the concrete floor near the door. That's usually the threshold failing. Another: insects or small debris inside the garage near the door jambs. Seals that have shrunk or hardened create openings large enough for bugs and dust to enter.
If your garage door is over 7 years old, the seals are probably ready for inspection. Weather stripping doesn't last forever. Unlike springs (which we've covered in detail at our garage door springs guide), seals degrade slowly and quietly. You might not notice until the season changes and your energy bill arrives.
Honest pricing matters. A standard bottom seal replacement runs between $150 and $300 depending on your door's width and the seal material. Side seals cost $75 to $150 each. A full threshold replacement with new gasket material typically falls in the $200 to $400 range. Most homeowners invest $400 to $700 for a complete seal system refresh.
**Need weather stripping and seals in Lakewood today?** Call 562-573-8421. We offer same-day estimates and can often complete the work the same afternoon.
Compare that to your annual energy waste. The cost pays for itself in 18 to 24 months through lower utility bills. Plus, you protect your foundation from water damage and your stored items from weather exposure. It's one of the smartest maintenance investments you can make.
We've installed thousands of seal systems across Lakewood and nearby areas. The price varies based on your door's condition and which components need work. That's why we always provide a detailed estimate before we touch anything. No surprises. No hidden fees.
Some homeowners try replacing the bottom seal themselves. Hardware store kits exist. The problem? Installation requires precision. The seal must compress evenly across the entire width. Gaps anywhere reduce effectiveness. If your door isn't perfectly level, a DIY seal won't work properly.
Professional installation ensures the seal sits flush. We check door alignment first. We remove the old seal cleanly. We measure twice. We install the new seal so it compresses uniformly when the door closes. This attention to detail is why our work lasts.
If you're handy and want to try minor maintenance, check out our spring maintenance tips. But seals warrant a professional touch. The cost difference is small. The performance difference is huge.
For your full range of options, visit our weather stripping and seals service page to learn what we can do for your specific door.
Don't wait until next season. If you notice drafts, visible cracks, or water entering your garage, schedule a free quote today. We serve Lakewood and surrounding areas with same-day estimates. Most repairs complete within hours.
Worn seals don't improve on their own. They degrade faster once they start failing. Address the problem now, and you'll save money and headaches all year.
Contact Garage Door Lakewood at 562-573-8421 or book your free estimate online. We'll inspect your seals, explain exactly what needs work, and give you an honest price. No pressure. No nonsense. Just straightforward service from someone who cares about your garage.
How long do weather stripping and seals last? Most rubber and vinyl seals last 5 to 7 years in Lakewood's climate. UV exposure and temperature swings accelerate wear. Inspect seals annually and plan replacement every 5 to 6 years for best results.
Can a bad seal damage my garage door? Not directly. But it allows water infiltration and drafts that damage surrounding structures and inflate energy costs. Long-term moisture exposure harms concrete floors and stored items inside.
What's the difference between a bottom seal and a threshold? The bottom seal is the rubber strip mounted on the door itself. The threshold is the horizontal gasket in the door frame at the base. Both wear out and should be replaced together for complete protection.
Will new seals improve my garage's temperature? Yes. New seals reduce drafts and air leakage significantly. You'll notice more consistent temperatures and lower heating and cooling costs, especially in winter and summer months.
How do I know if I need side seals too? Check for daylight along the sides of the door when it's closed. Feel for drafts on windy days. If your energy bills are high and your garage feels drafty, side seals likely need attention alongside the bottom seal.