The Argument Usually Starts in the Laundry Room
You're folding towels, or grabbing something off the shelf by the door into the garage, and you feel it: a cold draft sliding across your ankles even though the thermostat says 70. You mention it. Your spouse says the garage is supposed to be cold, that's just how garages are. You're not so sure, because the floor by that shared wall never used to feel like this, and your last couple of utility bills were higher than you'd expect for the weather. This is the argument. Here's how to settle it.
Why an Attached Garage Isn't "Just a Garage"
In a detached garage, a drafty door is a comfort issue at worst. In an attached garage, it's a different story, because that garage shares at least one wall, and often a ceiling, with living space. If there's a bedroom, bonus room, or laundry area above or beside the garage, the temperature in that garage directly affects how hard your HVAC system has to work to keep the rest of the house comfortable. A garage that swings close to outdoor temperature all winter and summer is basically an uninsulated buffer zone pressed right up against your conditioned home, and that buffer leaks.
Where the Air Is Actually Getting In
A garage door doesn't need a big obvious hole to cause problems. Small, steady leaks around the whole perimeter add up to more lost air than one dramatic gap. The usual suspects:
- Bottom seal (astragal): this rubber strip compresses and cracks over time, especially after repeated freeze-thaw cycles. Once it's flattened or torn, it stops sealing against the concrete.
- Side and top weatherstripping: this is easy to overlook because it's not at eye level. Brittle, sun-faded, or detached stripping here lets air move freely along both sides and across the top.
- Panel seams and the center gap between two panels: older doors or ones that have taken a minor hit can develop gaps that whistle in windy weather.
- Uninsulated or thin door panels: some older garage doors are basically a single layer of steel or wood with no thermal break, which means the door itself is a weak point even with perfect seals.
Why This Matters More Here Than in Milder Climates
Franklin County weather doesn't do gentle. Winters bring real cold plus ice and road salt, which accelerates wear on rubber seals and can cause them to stiffen and crack faster than in a mild climate. Summers bring heavy humidity, which means a leaky garage isn't just letting heat in, it's letting moisture in, which can show up as condensation on cold surfaces or a musty smell. And the big swings between seasons, especially heading into the cold months after a humid summer, put repeated stress on the door and its seals as materials expand and contract. A door that was fine in June can develop a new gap by December just from that cycling.
What a Leaky Door Actually Costs You
You won't usually see a single line item that says "garage door leak" on your utility bill, but here's what it looks like in practice:
- The thermostat zone nearest the garage runs more often because that wall is losing heat (or gaining it, in summer) faster than the rest of the house.
- Floors and walls adjacent to the garage feel noticeably colder in winter, warmer in summer, than the rest of the room.
- You notice drafts at ankle height near interior doors that connect to the garage.
- In winter, you might see frost or condensation forming on the inside of the garage door or on items stored near it.
None of this is dramatic on its own, which is exactly why it's easy to argue about. But a door that's visibly sealing poorly, especially a heavily used one on an attached garage, is a real and ongoing drain, not a minor inconvenience.
What You Can Check Before Calling Anyone
- Close the door and look for daylight along the bottom, sides, and top from inside the garage with the lights off.
- Run your hand along the weatherstripping. If it's hard, cracked, or peeling away from the track, it's not doing its job.
- Check the bottom seal for flat spots or tears, especially if the garage floor has been salty or icy over past winters.
When to Call Pacific Garage Door
If you're finding gaps, cracked seals, or a door that feels thin and uninsulated compared to the rest of your house, it's worth having it looked at before winter sets in. Pacific Garage Door handles weatherstripping and seal replacement as part of routine garage door maintenance, and for doors that are older or were never insulated to begin with, we also talk through options as part of a garage door installation if replacement makes more sense than repair. We'll tell you honestly which one you actually need.
If the draft in your garage has turned into a real household debate, give Pacific Garage Door a call. We serve Pacific, Eureka, Gray Summit, Union, Wildwood, Villa Ridge, St. Clair, and Washington, and we're happy to come take a look and tell you straight what's letting the weather in.