Spray Foam Insulation in Didsbury, AB.

71.6% single-detached and 43.3% pre-1980 gives a town of older houses on individual lots — the ordinary Central Alberta pattern, at a size where about 886 buildings need the pre-code conversation.

In stock of that era and type, the sequence is fairly predictable. The attic plane is where the largest single loss usually sits, because warm air rises through top plates, plumbing stacks and an unweatherstripped hatch and takes moisture with it into a cold, vented space. The rim joist is next, being a continuous band of exposed framing around the whole perimeter that older practice treated as somewhere to wedge a piece of batt. Walls come last, because opening them is the expensive part and rarely justifies itself before the first two are done.

At about 80 km, Didsbury's borrowed climate station is a long way off. The ledger assigns RED DEER REGIONAL A (climate ID 3025480): 5,619 heating degree days at an 18 °C base, an average January daily minimum of -17.6 °C and -43.8 °C at the recorded extreme. Didsbury lies south of Red Deer and closer to the Chinook belt, where the Calgary station reads materially milder — the assigned figure is a regional approximation, and at this distance a coarse one.

Didsbury shares the Olds-Didsbury Regional Airport business park with neighbouring Olds. Airport-adjacent business park buildings tend to be large-span, lightly framed and dominated by roof and door area rather than wall area, which puts the envelope decision on the roof plane and the openings rather than in the stud cavities.