A vented, uninsulated crawl space is a cold, humid void directly under your floor - and everything above it pays for it with cold rooms and higher bills. Closed-cell spray foam turns that void into part of the conditioned house.
Encapsulate, do not just insulate
The modern approach seals the crawl space rather than venting it: closed-cell foam on the walls and rim brings the space inside the building envelope, stops ground moisture and outside air, and keeps the floor above warm. In Alberta's climate, a sealed crawl space also protects plumbing runs from freezing.
Why foam suits the space
Crawl spaces are tight, irregular and moisture-prone - exactly where batt fails and closed-cell excels: it conforms to the geometry, resists water, and air-seals in one pass.
Get a free quote for a vetted installer to assess your crawl space. See basement foam for the connected below-grade picture.