By Trust Build Windows and Doors ·
A homeowner near Plains Road in Aldershot called us this fall with what sounded like an insulation problem. The bedroom above the garage — the one her son uses — was noticeably colder than the rest of the house, no matter how high she turned up the thermostat. She'd already had someone check the attic. She'd had the furnace serviced. Nobody had looked at the garage door.
That's a pattern we see a lot in this part of Burlington. Aldershot's housing stock leans heavily on 1950s and '60s bungalows and raised ranches, many with an attached garage tucked under or beside a bonus room, and in a lot of those homes the original garage door is still doing the job it was built for in 1968: keeping rain and raccoons out. Keeping heat in was never really part of the design.
Here's the mechanic of it, because it matters: an attached garage shares at least one wall, and often a ceiling, with conditioned living space. If that garage is cold — and an uninsulated single-layer steel door does almost nothing to stop outside air from matching outside temperature inside the garage within an hour or two — then whatever room sits above or beside it is losing heat through that shared surface all winter long. You can insulate the attic perfectly and still have a cold bedroom, because the problem isn't the attic. It's the big uninsulated panel facing the driveway.
Replacing that door is a smaller job than most people expect, and it solves a problem that's easy to misdiagnose for years. A modern insulated garage door — the kind we install across Halton — uses a polyurethane foam core sandwiched between steel skins, typically rated somewhere in the R-12 to R-18 range depending on panel thickness. Compare that to a vintage single-skin door, which has no meaningful R-value at all, and the difference in how that garage holds temperature is immediate. We've had Aldershot customers tell us their garage went from "you can see your breath" to workable storage space for tools and bikes through January, just from the door swap.
There's a second piece worth understanding if you're weighing this: weatherstripping and bottom seals matter as much as the panel insulation itself. A well-insulated door with a worn-out astragal seal or gaps at the jambs will still let cold air stream in along the edges, which is often the actual complaint — not "the door is cold" but "there's a draft I can feel from the laundry room." Fit matters as much as R-value, and on older Aldershot garages with slightly settled framing or uneven concrete aprons, getting that fit right usually means a proper reinstall rather than a stock-size swap.
Timing-wise, late fall through early winter is actually a reasonable window for this work, despite what people assume. You're not pouring concrete or dealing with wet caulking in freezing rain — a garage door swap is a controlled, mostly indoor-adjacent job, and doing it before the coldest stretch of January means you're not living with the draft through the worst of it. We do ask Aldershot homeowners with older openers to budget for a bracket or track upgrade in the quote stage, since many original openers and tracks weren't sized for today's heavier insulated panels.
We install Energy Star-certified products with certified technicians, and Trust Build has now done this kind of work for more than 8,700 homeowners across Ontario. For homeowners weighing the cost against a furnace upgrade, 0% financing through Financeit is available — and a garage door swap is often the cheaper fix that actually solves the room-temperature complaint, where an HVAC upgrade wouldn't.
If you've got a cold spot and aren't sure whether the garage door, the attic, or something else is to blame, have someone look at the door itself before assuming it's an insulation gap upstairs — the two get confused constantly, and they're fixed in completely different ways. Our attic insulation services page covers the other half of that equation if your bonus room issue turns out to be both.
Frequently Asked Questions
Will a new insulated garage door actually change the temperature of the room above it?
In most attached-garage layouts, yes — noticeably. The garage door is usually the single largest uninsulated surface connected to that shared wall or ceiling, so swapping a single-skin steel door for an insulated sectional door removes the biggest source of heat loss in that chain. It won't fully replace proper attic or wall insulation if those are also lacking, but homeowners typically notice the difference within the first cold stretch.
How long does a garage door replacement take in a typical Aldershot home?
Most single-car and double-car residential installs are completed in a day, including removing the old door, fitting new tracks or hardware if the opener needs an upgrade, and final weatherstripping. Homes with non-standard openings or settled framing can take a little longer.
Do I need a permit to replace a garage door in Burlington?
A straight swap — same size opening, same location — generally doesn't require a building permit in Burlington, since it's considered a like-for-like replacement rather than a structural change. If you're altering the opening size, that's a different conversation, and we'll flag it during the quote.
Can I keep my existing garage door opener with a new insulated door?
Often, yes, but it depends on the weight difference between your old and new door and the age of your opener. Older openers weren't always sized for heavier insulated panels, so we check the opener's horsepower and the condition of the tracks as part of the quote rather than assuming it'll carry over.
Related reading: Choosing an Insulated Garage Door for Clarington Winters and The Garage Door That Wouldn't Close Right, Rebuilt in Markham cover two other angles on garage door problems we see across the GTA. For Burlington-specific windows and doors services, see our Burlington service area page.