Calgary is an older housing market than its skyline suggests - roughly 52% of Calgary homes were built before 1991, back when air-sealing wasn't part of the code. That's the backdrop to most spray foam quotes in this city: you're not just adding R-value, you're closing decades-old leaks a chinook drives cold air straight through. Here's how a Calgary quote is actually built.
Board feet, not a flat rate
Every honest Calgary installer prices in board feet - one square foot at one inch thick. A 900 sq ft bungalow attic sprayed to 6 inches is 5,400 board feet, and that number, times the foam type, is your quote. The drivers:
- Foam type - closed-cell costs more per board foot than open-cell, and does more (R-6 to R-7, vapour barrier, rigidity). In Calgary's older, moisture-prone basements, closed-cell usually earns it.
- Target R and thickness - attic R-38 is ~6" closed-cell or ~11" open-cell.
- Access - an open reno wall sprays cheap; a 1970s crawlspace in an established SW community costs more in labour.
Why Calgary's housing age matters to the number
The pre-1991 stock across the NW, SE and inner-city communities tends to have leaky rim joists, under-insulated basements and additions that never sealed properly. Those are the highest-return spray foam targets in the city - and they're why a Calgary quote for an older home often pays back faster than the sticker suggests.
Get a real Calgary number
Estimate board feet with the calculator, then get an exact quote from a vetted Calgary installer on your actual space. We never post a flat price as a quote. See also what drives cost province-wide.