The Problem
Walk into most garages in West Allis built between the 1960s and 70s and you'll find the same thing
A bottom seal that's cracked, flattened, or shrunk away from the slab entirely. These houses went up between 1938 and 2000, with the bulk of the stock dating to that 1960s-70s window, and the garage doors that came with them were never built with the sealing standards you'd expect today. A door from that era might still open and close fine, which is exactly why nobody replaces the seal until the draught under it is bad enough to notice in January. By then cold air has been pouring across the slab for years, and the opener, springs, and tracks have been working in a space that never holds heat.
This isn't a cosmetic issue
A garage that bleeds cold air pulls down the temperature of anything stored against the shared wall, and if that wall backs a laundry room or a finished space, the furnace runs longer to make up the difference. The fix usually isn't the door itself - it's the seal around it, and sometimes the weatherstripping along the jambs that's just as old as the bottom seal.
Where People Go Wrong
The most common mistake we see is treating the bottom seal as a lifetime part. It isn't. Rubber and vinyl seals on doors from the 1960s-70s stock have usually been replaced once, if at all, and in a climate that swings into severe cold, that rubber hardens and cracks faster than owners expect. People notice daylight under the door and assume the slab has settled, when it's almost always the seal that's failed.
The second mistake is sealing the bottom and stopping there. On a door with the original side jambs, the weatherstripping along the tracks is often original too, and it's just as brittle. We've opened up jobs where the bottom seal was brand new but the side seals were from the house's original build, still letting air through at every gust. If you're going to deal with draughts on a house this age, check both or you've only solved half the problem.
The honest limit here: if the door panel itself has warped from decades of temperature swings, a new seal won't fix that. At that point you're looking at panel replacement, not a seal job, and we'll tell you that up front instead of selling you a seal that won't hold.
What Local Conditions Do
West Allis sits in a climate band we'd call cold and severe, and that matters more for garages than for the rest of the house. A living room gets heated air circulating through it all winter. A garage doesn't - it sits at outdoor temperature except for whatever heat leaks in from the house, and a bad seal means almost none does. Severe cold cycles the rubber in a seal through expansion and contraction dozens of times a season, and on doors already decades past their install date, that's what finally splits a seal that looked fine in October.
The same cold also stiffens the grease in track rollers and tightens steel cable just enough that a door already working against a bad seal starts working harder across the board. It's rarely one failure - it's a seal that's gone plus hardware that's feeling the same cold at the same time. On a house with 1960s-70s era hardware, that combination shows up as a door that's noticeably harder to lift by February than it was in September, even though nothing broke outright.
What Changes With the Season
The seal problem isn't constant - it gets worse as the season goes on
A seal that looks adequate in October, pressed flat against a slab, can shrink enough by January's worst cold to leave a visible gap, especially on original hardware from houses built in that 1938-2000 range. If your garage shares a wall with living space, that's the stretch when you'll feel it - a cold spot in the adjoining room that wasn't there in fall.
We'd rather catch this before the worst of the cold sets in
Once severe cold has already hardened an old seal, replacing it is still worth doing, but you won't get the full benefit until the following season when the new seal has had a mild stretch to seat properly against the slab. If you're dealing with draughts right now, it's worth having the door looked at - not just the seal, but the jamb weatherstripping and the hardware that's been working through the same temperature swings. Get in touch and we'll tell you honestly whether a seal fixes it or the door's past that point.
