When to Get Help
Call someone when you can see daylight around the edges of a closed door, when a cold draft moves across the garage floor on a winter morning, or when water tracks in along the bottom corners after rain. Those are seal problems, and on a door from the 1958-2001 stock common here, they're often paired with a track that's shifted slightly out of alignment over the decades - worth having someone look at both at once rather than patching the seal twice. If the bottom seal has gone stiff and cracked in multiple spots rather than just worn thin in one place, that's past a quick fix. Also get help if the weatherstripping has pulled loose from its track entirely, since forcing a new strip into a warped channel usually fails again within a season. One honest limit: if the door panel itself has warped or delaminated from years of humidity exposure, no amount of new seal will fix that - at that point you're looking at a new section or a full door, and we'll tell you that straight rather than sell you a seal that won't hold.
What Is Going On
The mechanism is straightforward once you see it. Vinyl and rubber seals are flexible because of plasticizers in the material, and those plasticizers break down faster under UV light and repeated humidity cycling than they do in a drier, more stable climate. Metairie's mild-with-occasional-freeze pattern means the seal never gets a long stretch to just sit still - it's swelling with moisture, drying out in the sun, swelling again, for years on end. On a door built in the 1980s or 90s, which describes most of the stock across the 36 named areas in this part of the metro, that seal has had three to four decades of that cycle. Add in ordinary house settling, which affects slab foundations across this area the same way it affects any older neighborhood, and the track can drift just enough that the seal no longer sits flush even when it's not yet cracked. So what looks like one problem - a draft - is usually two: an aged seal and a track that's a few degrees off true. Fixing only the seal buys you a season, maybe two, before the gap reopens.
