Lawrenceville, GA · Garage Door Service
Cold air under the door, ice at the threshold, a whistle when the wind picks up. Here's what causes it in Lawrenceville houses and when a seal job actually fixes it.
If you can see daylight along the bottom of the door, or you feel a cold line of air moving across the garage floor on a windy night, the bottom seal has given up. That's a same-day kind of problem, not an emergency, but it's worth handling before a hard freeze because a torn seal lets water pool under the door and that water can find the slab crack it's been looking for. A whistling sound at the top corners usually means the stop molding has pulled away from the jamb, which is a different repair than the bottom seal and often gets ignored because it's quieter. Call sooner rather than later if the door is original to a house built in the 1980s or 90s stretch this area is full of - that factory seal has had three decades of Georgia summers and winters working against the rubber, and it doesn't fail gracefully. It cracks, then it shrinks, then one cold snap it just stops sealing at all. If the seal is brittle enough that it's flaking off in pieces when you touch it, don't wait for spring.
A weatherstrip and astragal job is one of the cheaper things we do, but the honest answer is it depends on what's under the door once we pull the old seal off. A straight swap on a standard door track is quick work. It gets more involved if the bottom retainer track is rusted or bent, which we see more often on doors from the older end of this area's housing stock - anything pushing toward that 1951 to 1991 range - where the original track wasn't galvanized as heavily as what goes in now. We also don't carry every seal profile and width on the truck. Wide five-panel doors and some older astragal channel shapes sometimes mean a special order, and that's the one honest limitation here: not every job finishes in one visit. We won't quote a number over the phone without seeing the door and the track, because guessing at that stage does the homeowner no favors. What we can tell you is that a full seal replacement almost always costs less than the water damage a bad seal causes over one winter.
Housing in this service area was built mostly between 1951 and 2012, with the median landing around 1991, and the bulk of it clusters in that 1980s-to-90s wave spread across the 25 named neighborhoods the area covers. That matters for weather sealing because doors installed during that build-out are now thirty-plus years old, and rubber doesn't last that long no matter how well the door itself has held up. A lot of these garages still have their original bottom seal and side stops, just brittle now instead of supple. With 37,793 owner-occupied houses among the 88,407 households in this area, that's a large number of garages running on seal material older than the roof shingles. Grayson sits five miles off, Dacula six, Sugar Hill ten - the same construction era shows up across that whole stretch, which is part of why this is the single most common call we get that isn't a broken spring. It's not dramatic. It's just a door that was built right and sealed fine in 1991, and hasn't been touched since.
This area sits in a cold-moderate climate band, which means the seals don't face brutal winters, but they do face real freeze-thaw cycling - cold nights, warmer days, cold again - and that swing is harder on rubber than steady cold ever is. Repeated contraction and expansion is what turns a seal brittle years before it would fail in a milder or more stable climate. The bottom seal takes the worst of it because it sits closest to the slab, where moisture collects overnight and freezes into the seal's grooves, then thaws and softens the material by afternoon. Over a few winters that cycle cracks the rubber along the same fold line every time. Side seals and the top stop molding age slower since they're not in contact with ground moisture, but they do shrink slightly with each cold snap, which is what opens that thin gap you can feel wind moving through at the corners. None of this is dramatic weather - no hard freeze headline, just an ordinary cold-moderate winter working on a seal that was already thirty years old going in.
Run your hand along the bottom edge and the side jambs on a windy day. If the draught is only along the floor, it's the bottom seal. If you feel it at the top corners too, the stop molding along the frame has likely pulled loose - a separate, usually cheaper fix than people expect.
It cuts it down a lot, since a tight seal keeps standing water from pooling right at the threshold overnight. It won't stop ice entirely if water is draining toward the garage from outside - that's a grading issue, not a seal issue, and worth mentioning separately.
Not always, but it's common. A lot of houses in this area were built in that stretch and never had the seal touched since. If it's cracked, flaking, or flat in spots instead of round, it's original and past due, regardless of exact age.
Call now or request a free quote - same-day service on most repairs, upfront written pricing.
