Weather Seals and Draughts in O'Fallon Garage Doors

Local detail

The Cost of This Job

We don't have a flat number to hand you here, and we're not going to make one up. What drives the cost on a seal job is the door width, the seal profile your track and panel edge were built around, and whether the jamb weatherstrip has to come off in one piece or in sections because it's brittle. A single-car door is a different job than a double. If the aluminum retainer channel is bent or rusted through, that's extra labor before the new seal even goes in. What we can tell you is that houses in O'Fallon went up mostly between 1953 and 2011, with the bulk of that stock dating from the 1980s and 90s, so most of the doors we're called to work on share a handful of common seal widths and retainer styles from that era. That narrows the guesswork on parts, but it doesn't set a price over the phone. If you want a real number, we look at the door in person before we quote it.

The area

What Is Going On

Draught around a garage door almost always comes from one of three places: the bottom seal has gone flat or split, the vertical weatherstrip along the jambs has pulled away or cracked, or the top seal where the panel meets the header has shrunk and left a gap you can see daylight through. On a door from the 1980s-90s run that makes up most of O'Fallon's stock, the factory seal was rubber, not the vinyl-and-PVC composite seals sold now, and rubber that age has usually hardened past the point of flexing back into the track groove. You'll feel it before you see it - a cold draft along the garage floor, or a line of dust and leaves that's worked its way under the door edge. Sometimes it's simpler: the door itself is out of level by a quarter inch at one corner, so no seal, new or old, sits flush against the slab. That's a track and roller adjustment, not a seal problem, and it's worth ruling out first because swapping a seal onto a door that's out of level just buys you the same gap again.

What we find

What the Weather Here Does to It

O'Fallon sits in a cold-severe climate band, which means the bottom seal and jamb weatherstrip aren't just dealing with one bad week in January - they're cycling through freeze and thaw repeatedly across the season. Rubber and vinyl both stiffen hard in deep cold, and a seal that's already thinning from age can crack right along the fold line the first time it's asked to flex at ten degrees. That cracked seam is where the real draught gets in, and once moisture sits in it, the next freeze splits it wider. Across the 1980s-90s housing stock that dominates this area, we see the same failure pattern on bottom seals: fine in October, visibly split by February, worse the next winter if it's not replaced. The jamb seals go the same way, usually a year or two behind the bottom seal since they take less direct weight and contact. If your seal looks intact in September, that's not a guarantee it'll make it through a full O'Fallon winter - it's just not failed yet.

How we work

When It Stops Being a DIY Job

Replacing a bottom seal on a door that's level and running true is a job a lot of homeowners handle themselves - pull the old one out of the track, feed the new one in, done. Where it stops being that simple is when the retainer channel itself is bent, rusted, or the track no longer holds a seal of any width square against the floor. At that point you're not swapping a $20 strip, you're dealing with hardware, and forcing a new seal into a bent channel just means it pops back out the first cold snap. The other line we draw: if the door is badly out of level or racked in the opening, the seal is the symptom, not the cause, and no amount of weatherstripping fixes a frame problem. We'll tell you straight if that's what we're looking at instead of selling you a seal that won't hold. Given that most houses in this area date to the 1980s-90s stretch of that 1953-2011 range, bent or corroded retainer channels aren't rare - the hardware's simply old enough now to be failing on its own schedule.