Why garage doors in Reston's 1980s-era neighborhoods let in cold air, what changes each season, and what it actually takes to fix the seals for good.
Related: Garage Door Service · areas we serve · how we price a job.
What Is Going On
If you feel a draft along the bottom or sides of your garage door, it's almost always the seal, not the door itself. Across this service area, most houses were built between 1940 and 2015, with the heaviest concentration going up in the 1980s and 90s across the 41 named neighborhoods we cover, Wolf Trap, Oakton, Great Falls, and the rest. That era of construction used vinyl bottom seals and brick-mold jamb seals that were fine for their time but weren't built to last 40 years. The vinyl hardens, shrinks, and pulls away from the track. Once that happens, cold air finds the gap and comes straight through, no matter how well the door itself still operates. We see this on doors that otherwise open and close without a problem, the door's fine, the gasket around it isn't. It's a five-minute inspection to tell the difference, and it matters, because you don't want to replace a door when the fix is a seal kit.
What Changes with the Season
In spring and fall, a gap under the door is mostly a nuisance, some leaves blow in, maybe a draft you notice at night. In winter, the same gap turns into a real heat loss point, especially in a garage that shares a wall with living space, which is common in the tract-home layouts built through this area's 1980s boom. With 87,102 owner-occupied houses out of 257,819 households across this service area, a lot of that housing stock shares this exact seal profile, same era, same materials, same wear pattern. Come summer, the opposite problem shows up: seals that shrank all winter don't fully recover, so the gap stays even when it's warm out, and now you're losing conditioned air instead of heat. The fix doesn't change by season, but the urgency does. We'd rather replace a seal in October than get the call in January when the garage floor has ice on it.
What the Weather Here Does to It
This area sits in a cold moderate climate band, which means real freeze-thaw cycling every winter, not the brutal deep freeze you'd get further north, but enough swings above and below freezing to work a seal loose over a few seasons. Steel and aluminum jambs contract in the cold enough that you can feel the gap open with a bare hand on a January morning, then it closes back up as temperatures rise. That constant flex is what tears vinyl seals at the corners first, which is usually where owners notice the draft to begin with. Wood jambs, common in the older end of the 1940‑2015 build range, swell and shrink with humidity on top of the temperature swing, so those doors often need the jamb seal redone more than once over the life of the door. None of this is dramatic weather, no named storms, nothing on the news, it's just steady cycling that wears rubber and vinyl down faster than a mild, stable climate would.
What It Costs
I can't give you a number here without a real fact to back it up, and I'd rather tell you that than guess. What I can tell you is what drives the cost: whether it's just a bottom seal (cheap, fast) or the full jamb seal around the sides and top (more labor, especially on brick-mold openings typical of this area's 1980s stock). A median household income of $140,837 across this service area means most owners here choose to do the job right the first time rather than patch it twice, and that's usually the cheaper path over a few winters anyway. One honest limitation: if the jamb itself has rotted or rusted behind the seal, that's not a seal job anymore, that's a jamb repair or door replacement, and no seal kit fixes that. Call and we'll tell you which one you've got before we quote anything.
Questions, answered
Why does my garage door only draft in winter?
Vinyl and rubber seals contract in cold weather, and this area's cold moderate climate puts them through real freeze-thaw cycling every winter. The gap you feel in January often closes back up by June, which is why a lot of owners forget about it until the next cold snap opens it back up.
Is a drafty garage door a sign I need a new door?
Usually not. Most draft complaints in this area's 1980s and 90s housing stock come down to a worn bottom seal or jamb seal, not the door panels or hardware. Replace the seal first, it's the cheaper fix and it solves the problem in most cases we see.
How often do garage door seals need replacing?
There's no fixed schedule we can quote without more to go on, but a house built in the 1980s tract boom common to this area is a reasonable candidate for a seal check if it's never had one. If you can see daylight under the door, that's your answer regardless of age.
Tell Us What the Door Is Doing
Call and we'll say whether it sounds like a spring, a cable, a roller or an opener board, and roughly what we will need to bring.