What Is Going On
Most garage doors in this service area went up somewhere between 1938 and 2003, with the median build year landing around 1983. That means a huge share of the doors we look at still carry factory weatherstripping from a design era before today's compression seals were standard. The vinyl on the bottom astragal and the flexible strip along the sides both harden and crack over decades of temperature swings. Once that happens, you get a visible gap at the floor, light coming through the top corners, or a cold line you can feel standing a few feet inside the garage. It's rarely one dramatic failure. It's the rubber losing its memory a little every winter until the door stops sealing the way it did when the house was new. On the 1980s-90s stock that makes up most of the local housing, we also see the original aluminum retainer channel still in place, which limits which replacement seal profiles actually fit without swapping the track too. That's the detail that trips up a DIY seal kit bought off a shelf sized for a newer door.
The fix is usually straightforward once we know the retainer style, but guessing at it from a phone description is how people end up with a seal that doesn't seat.
What Local Conditions Do
This area sits in a cold, moderate climate band, not the deep freeze of the mountain passes but enough sustained cold and damp to work seals harder than a mild coastal town would. The freeze-thaw cycle here isn't extreme, but it's frequent, and frequent is what actually degrades rubber and vinyl faster than one hard freeze ever would. A seal that flexes and hardens, flexes and hardens, week after week through a wet Northwest winter, loses elasticity years before it would in a drier or steadier climate. That's why a door that sealed fine in October can whistle at the corners by February without anything having broken.
Moisture matters as much as temperature in this band. Damp air finds the gap a stiffened seal leaves behind and carries it into the garage, which is where we start seeing rust bloom on spring coils and track hardware that otherwise had years left in it. The draught itself is the visible symptom. The slower damage to metal parts behind the door is the one homeowners don't notice until something binds or squeaks. Sealing the gap early protects more than comfort - it protects the hardware living behind it.
The Cost of This Job
We don't have a set number to give you here without seeing the door, and we'd rather say that than make one up. What actually drives the cost on a seal and weatherstrip job is the retainer channel style, the door width, and whether the track needs any adjustment to get a new seal to seat flush - all of which varies across the older stock common in this area, since a door built in 1985 and one built in 2001 can take completely different seal profiles even if they look similar from the driveway.
A single-car door with a standard channel is a shorter job than a double door where the astragal has to run the full width without a seam. If the aluminum retainer itself is bent or rusted through, that adds a part to the job that a straight seal swap doesn't need. We'll tell you which situation you're in before we quote anything, and if the honest answer is that the seal is fine and it's actually the door alignment causing the draught, we'll say that instead of selling you a seal you don't need.
