Why Your San Ramon Garage Door Lets in Weather Seals and Draughts
San Ramon homes built mostly in the 1960s-70s show weather seals and draughts at the door bottom and sides first. Here's what that means for your garage and what the fix runs.
Most of the garage doors we look at around San Ramon sit on houses built somewhere between 1938 and 2008, with the bulk of the stock dating to the 1960s and 70s across the area's 29 named neighborhoods. That matters because the bottom astragal seal and the side-and-top weatherstrip on a door that age are usually long past their service life, even if the door itself still opens and closes fine. Vinyl seals harden and crack with age, and once that happens you get weather seals and draughts working against you instead of for you - cold air along the slab, dust sifting in under the bottom panel, and sometimes a thin line of daylight visible at the jamb when the door is shut. On older steel sectional doors from that era, the track alignment has often shifted a little over the decades too, which widens the gap the seal is supposed to close. None of this is dramatic. It shows up as a slightly colder garage, a draft near the laundry hookup if that's where yours sits, and leaves or fine dirt collecting along the base of the door after a windy week.
When to Call Someone
Call if you can see daylight at the bottom of the closed door, if the rubber bottom seal is cracked or has pulled loose from its track, or if the side weatherstrip has gone stiff and chalky rather than flexible. Those are seal and material problems, not alignment problems, and they're a straightforward swap. Call sooner rather than later if you notice the draught is worse on one side than the other - that usually means the door or track has racked slightly out of square, which is common enough on houses from the 1960s-70s stock once the original hardware has sat for decades, and a seal alone won't fix it. One honest limitation: if the gap is from a warped wood panel rather than a worn seal, a new seal will slow the draught but won't stop it, and at that point you're looking at panel repair or replacement, not just weatherstripping.
How Local Conditions Play In
San Ramon sits in a mild climate band with occasional freeze risk, not the kind of harsh winter that cracks seals from cold alone, but also not dry enough year-round to let a worn seal coast. The wear here comes more from UV and age than from ice, which is actually good news - it means a seal replacement job, once done, tends to hold up well without needing yearly attention. Where it matters more is on doors facing open, exposed driveways near the hillier parts of town toward areas like Blackhawk or Norris Canyon, both a few miles out, where wind-driven dust and the occasional cold snap make a failed seal more noticeable than it would be on a sheltered, flat-lot garage closer to the flatter sections of the service area. The freeze risk, while occasional, is enough that a bottom seal with a hardened, brittle edge can split further on the first cold morning of the season rather than just letting in a draught.
The Cost of This Job
A straightforward bottom seal and side weatherstrip replacement is one of the lower-cost jobs we do - parts are inexpensive and the labor is quick once we're on site, assuming the track and panel underneath are in good shape. It costs more if the draught turns out to be a symptom of a racked track or a warped panel, which, given how much of the local housing dates to the 1960s and 70s, isn't rare on a door that's never had the track hardware checked. With a median household income of $146,657 across the service area, most owners here choose to fix the seal and address alignment at the same visit rather than let a small gap turn into a bigger repair down the line. We don't have a flat number to quote without seeing the door - length of track, panel material, and how far out of square things have drifted all move the price.
01Why does my garage feel colder than it used to even though the door still closes fine?
On a door that's been in place since the 1960s-70s building wave common across San Ramon, the rubber seals age out well before the door itself does. A closed door can look fine and still have a hardened or shrunk seal letting cold air and draughts in along the bottom edge.
02Will a new seal fix a draught if the door is slightly crooked?
Not fully. A new seal closes the gap a worn one left, but if the track has racked out of square over the decades, you'll still get a draught on one side until the alignment is corrected. We check both when we're out.
03Does San Ramon's climate mean I need to replace seals more often than elsewhere?
The mild climate with occasional freeze here is easier on seals than a true cold-winter climate, so a good seal replacement tends to last. The occasional freeze is still enough to split an already-brittle old seal, which is why a cracked one is worth fixing before winter rather than after.
Ready to get your garage door sorted?
Tell us what it’s doing and where you are in San Ramon - we’ll take it from there.
