Medicine Hat has the oldest housing stock of any major Alberta city - about 61% built before 1991 - and nowhere shows a home's age faster than its attic. Decades of settled, thin or gapped insulation over an era of cheap-gas construction means the Hat's attics are among the leakiest in the province, and now that gas isn't cheap, that leak is a real monthly cost. Attic spray foam insulation in Medicine Hat has more old ceiling planes to seal than anywhere else we cover.
Why the Gas City's attics are prime targets
Much of the older stock was built when heating was cheap enough that attic air-sealing wasn't a priority. Those attics leak heat through every penetration, and the payback on fixing them is now among the best in Alberta because the old economics are gone.
Vented ceiling plane or sealed roof deck
- Vented attic: air-seal the ceiling plane with foam, then top with blown-in to R-38 - ideal for the older cores like Crescent Heights and Ross Glen.
- Unvented / newer complex rooflines: closed-cell to the roof deck in areas like Southlands and Saamis Heights.
Whatever is up there was put there to a standard nobody uses now
Medicine Hat attics are rarely empty and that is what misleads people. There is usually something up there, and it looks like insulation, and it was entirely adequate to the expectation of the decade it went in. On the cheapest energy in the country those expectations were modest, so a depth that was normal in the seventies is a fraction of what would be specified now, and it has since settled, been walked on, and been pushed aside by anybody who went up to run a cable. The useful question in this town is therefore not what to add on top. It is what is actually there, how deep it really is once it is measured rather than eyeballed, and whether the ceiling below it was ever sealed at all.
Why the venting decision drives the spec
An attic is either outside the building envelope or inside it. Foam at the flat keeps it outside; foam at the roof deck brings it in. Each is a valid Medicine Hat assembly. A half-and-half attic is not, and it is the most common way an attic job goes wrong.
The attic is a summer problem here too
In one of the sunniest places in the country an attic reaches temperatures well above the outdoor air, and that heat presses down into the rooms below all afternoon. Most attic advice in this province is written about winter, which understates the case in this city: the same sealed and insulated ceiling plane that holds heat in during January keeps it out during July, so the work is doing something useful at both ends of the year. Where a house has air conditioning, that second half is a running cost rather than a comfort inconvenience, and it belongs in the payback calculation.
Attic Spray Foam Insulation Medicine Hat: Common Questions
Is my attic a candidate? Almost any attic is; the question is whether to insulate the flat or the deck, and that follows the venting decision.
What about knob-and-tube or old wiring? It gets dealt with before anything is covered. That is scope, not a surprise.
Do soffit vents get blocked? Only deliberately, as part of converting to an unvented assembly - never by accident.
How much does attic spray foam insulation cost in Medicine Hat? Area and depth, plus whatever the wiring adds. Older Medicine Hat attics were built to a standard nobody uses now, and knob-and-tube or blocked soffit vents have to be settled before foam goes anywhere near them.
How do I choose an attic spray foam contractor in Medicine Hat? Ask what they found for wiring and whether the soffit vents are clear. Both are safety and performance items and both are cheaper to deal with before the work than after.
R-38 is about 6" closed-cell or 11" open-cell. Estimate yours, then get a free Medicine Hat quote. See attic foam province-wide.