Why Your Garage Door Has Drafts (And When Weather Stripping Fails in Los Gatos)
2026-09-06 7 min read
A customer called last Tuesday morning. His garage was frigid. The temperature outside had dropped to 38 degrees overnight, and he could feel cold air pouring in around his garage door like water through a sieve. He'd noticed the draft for weeks but assumed it was normal. It wasn't. His weather stripping and seals had failed completely, and his heating bills were climbing as a result. This scenario plays out dozens of times every month in Los Gatos, and it's entirely preventable.
Why Drafts Form Around Your Garage Door
Your garage door's weather stripping and seals exist for one purpose: to create an airtight barrier between your garage and the outside. When they fail, cold air, hot air, dust, pests, and moisture all find their way inside.
The bottom seal takes the most punishment. Every time your door opens and closes, it flexes, compresses, and eventually loses its shape. In Los Gatos, where we experience variable temperatures from coastal fog to warm afternoons, that constant expansion and contraction accelerates wear. Most bottom seals last 3 to 5 years before they stop sealing properly.
The threshold (that rubber strip running horizontally along the floor where the door meets the concrete) experiences similar stress. Water pools there during rain. Debris collects along its edges. Over time, it cracks, hardens, or separates from the door frame entirely. Once that happens, drafts become inevitable.
How to Spot Failing Weather Stripping and Seals
You don't need to wait for winter cold to detect a problem. Check these spots right now.
Look at the bottom seal. Does it sit flat against the floor, or does it curl upward at the edges? Curling means it's lost its flexibility. Stand inside your garage on a sunny day and look for light streaming in around the sides or top of the door. Daylight means air is flowing freely. Feel along the threshold with your hand. If there's a gap wider than a quarter inch, water and pests are getting through.
Listen for whistling sounds when wind picks up. That's air moving through gaps that shouldn't exist. Check your energy bills too. A sudden increase correlates directly with failed seals. If you've noticed any of these signs, learn more about when weather stripping replacement becomes necessary.
The Cost of Ignoring Draft Problems
Ignoring drafts costs money in three ways.
First, heating and cooling costs rise. Your HVAC system works harder to maintain temperature when conditioned air leaks out. Second, moisture intrusion accelerates rust and corrosion on your door's metal components. Third, pests enter more easily. Rodents, insects, and spiders find their way into your garage space when gaps appear.
There's also a safety angle many homeowners overlook. Poor sealing allows carbon monoxide to seep into attached garages more readily. If you run a vehicle inside for any reason, that's a serious concern. Failed weather stripping transforms a simple comfort issue into a potential health hazard.
**Need weather stripping and seals in Los Gatos today?** Call 669-338-3154. We offer same-day estimates and can often repair or replace seals the same day you call.
What Our Technicians Replace Most Often
At Garage Door Los Gatos, we replace bottom seals far more frequently than any other component. The rubber compound simply doesn't last indefinitely, especially in Bay Area climates.
Side seals come next. These vertical strips run along the left and right edges of your door. They're thinner than the bottom seal but equally important. When they deteriorate, cold air rushes in along the edges, creating an uneven draft pattern.
Threshold seals require replacement less often but cause more visible problems when they fail. Water pools inside your garage, staining concrete and potentially damaging stored items. Rodents use failed thresholds as entry points.
Top seals occasionally fail too, though they're protected somewhat by the door frame overhang. If you notice water dripping inside during rain, a failed top seal is likely responsible.
Repair Versus Replacement: What You Should Know
Sometimes weather stripping can be adjusted or repositioned without full replacement. If your bottom seal has simply shifted slightly, we can realign it. Cost runs 50 to 100 dollars for this type of service call.
If the seal material itself is cracked, hardened, or permanently deformed, replacement is the only option. A complete weather stripping and seal replacement typically costs between 200 and 400 dollars depending on your door type and condition. Get an accurate estimate for garage door repair costs in Los Gatos to understand what you're looking at.
Installation is straightforward for most homeowners willing to invest time, but improper installation leaves gaps. Professional installation guarantees the seal works correctly from day one. We offer same-day service across Los Gatos and nearby communities. No need to wait weeks for comfort and efficiency to return.
Prevention and Long-Term Care
Inspect your weather stripping seasonally. Fall is ideal, before cold weather arrives. Spring inspection catches winter damage. If you notice small gaps forming, address them immediately rather than waiting for complete failure.
Keep the bottom seal and threshold clean. Dirt and debris prevent proper sealing. A simple vacuum and damp cloth work well. Avoid harsh chemicals that degrade rubber compounds.
Consider your garage door maintenance schedule holistically. Weather stripping fails alongside other components sometimes. If you're having spring issues or opener problems, have seals inspected simultaneously. Learn why skipping tune-ups costs you twice as much later.
Your garage door protects your home and vehicles. Proper weather stripping and seals support that protection while reducing energy waste. Don't let small gaps become big problems.
If you're experiencing drafts, cold air, moisture intrusion, or suspect seal failure, contact us today for a free quote. We'll inspect your door, identify exactly what needs attention, and provide an honest price. Call 669-338-3154 or use our online booking system. Comfort and efficiency are worth protecting.
Frequently Asked Questions
How long do garage door weather strips last? Most weather stripping lasts 3 to 5 years with normal use. Los Gatos' variable temperatures accelerate wear. Bottom seals fail first due to constant flexing during door cycles and ground contact.
Can I replace weather stripping myself? Yes, but improper installation leaves gaps. The seal must compress evenly across its entire length. Professional installation ensures no drafts and typically costs 200 to 400 dollars for complete replacement.
What's the difference between a bottom seal and a threshold? The bottom seal hangs from the door's bottom edge and seals the gap when closed. The threshold is a rubber strip on the floor that creates a barrier where the door meets concrete. Both require maintenance.
Will new weather stripping reduce my energy bills? Absolutely. Failed seals allow conditioned air to escape. Replacement typically reduces heating and cooling costs by 10 to 15 percent, depending on your system and climate usage patterns.
How do I know if my seals are failing? Look for light under the door, feel for drafts, check for visible cracks or hardening, and listen for whistling during wind. Water pooling inside your garage also signals seal failure.