Spray Foam Insulation in Airdrie, AB.

65.5% of Airdrie's dwellings are single-detached, and the population grew 20.3% between the 2016 and 2021 censuses — the housing here was largely built inside a couple of code cycles, by a handful of builders, to a broadly consistent spec.

That changes what goes wrong. With only about 2,472 pre-1980 dwellings in the city, the recurring problems are not missing insulation — they are the places a builder legitimately left outside the conditioned envelope and an owner later pulled inside it. Attached garages converted to workshops, bonus rooms sitting over an unheated garage ceiling, cantilevered floors above outside air, rim joists above a basement that was framed but never finished. Each is a cold spot in a house that is otherwise sealed, which is exactly why it is noticeable.

Airdrie's climate figures are borrowed. They come from CALGARY INT'L A (climate ID 3031092), about 15 km away. Airdrie has no station of its own, and this is the only community in the ledger assigned to Calgary.

That station records 4,994 heating degree days at an 18 °C base, a January daily minimum averaging -13.5 °C and an extreme of -39.7 °C. It is the mildest reading of the five stations used across these 27 communities — about 626 degree days below what Red Deer Regional A records, a genuine Chinook-belt difference rather than a rounding artifact. Airdrie is the one town on this list where the regional heating load is materially lighter.

Airdrie names four commercial and industrial nodes rather than one industrial park: East Lake Industrial, Gateway Commercial, Sierra Springs Commercial, South Pointe Commercial. Multi-tenant commercial shells like these are usually insulated at construction and then subdivided, so the envelope has to hold up to demising walls being moved around it by later tenants.