Crawl space spray foam insulation in Airdrie is worth being straightforward about: most houses in town do not have one. Airdrie's housing is newer and built on full basements, so the crawl space work here is on the acreages outside town and on additions to older properties.
Mostly a county question rather than a town one
On Rocky View County properties around Airdrie the crawl space is common, and it usually carries services with it: a water line, sometimes a pressure tank, occasionally a septic run. That turns it from a comfort question into one about whether anything freezes, and it is a different conversation from the one an in-town homeowner would have. Establishing which situation applies takes one question and saves a wasted visit.
The addition on an older house
The other version is a shallow crawl under a room added to a house that otherwise sits on a basement. Those are frequently built quickly, insulated between the floor joists if at all, and vented to outside on the assumption that outside air will keep them dry. The room above is always the cold one in the house, and the reason is underneath it rather than in its walls.
Why a vented crawl does not dry itself
The theory is that outdoor air removes moisture. In this climate it does the opposite for a good part of the year: in winter it brings genuinely cold air in beside whatever is down there, and in summer it brings warmer humid air onto surfaces that are still ground-cold, where it condenses. Sealing the space and bringing it inside the building envelope is what actually keeps it dry, and it is the change that makes the room above usable.
The order that works
Ground cover first, lapped and run up the walls, because bare soil evaporates into the space continuously and insulating over it traps that moisture in the assembly. Then foam on the perimeter walls and the rim joist rather than up between the floor joists, which is what brings the crawl inside the envelope instead of trying to separate it from the house. Getting that order wrong is the most common reason a crawl space job disappoints, and it is entirely avoidable by settling the sequence before anyone arrives.
Crawl Space Spray Foam Insulation Airdrie: Common Questions
Do Airdrie houses have crawl spaces? Most in town do not -- the stock is newer and built on full basements. This is mainly county acreages and additions to older houses.
Should the vents be closed? Yes. In winter they bring cold air in beside the services and in summer they bring humid air onto ground-cold surfaces where it condenses.
Does the ground cover really come first? It does. Bare soil evaporates continuously, and insulating over it traps that moisture inside the assembly rather than removing it.
Does a sealed crawl space still need covering? If it can be entered, yes. An Airdrie crawl space that is accessible needs an ignition barrier or a thermal barrier over the foam.
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