Crawl space spray foam insulation in Cold Lake turns up under two kinds of building: the oldest houses in the original town, and additions put onto houses of every vintage since. The newer subdivisions almost all have full basements.
Under the additions, and under the oldest houses
A back extension, a family room or an enclosed porch added at some point was frequently built over a shallow void rather than tied into the basement, because that was quicker and cheaper. That is why one room in an otherwise comfortable Cold Lake house has a cold floor and nothing else does. In the older core there are also houses that predate a full excavation, and those are a different and more variable proposition again.
The freeze risk is genuine this far north-east
Plumbing run through a shallow void was fine when it was built and is a real exposure in a winter of this length. A pipe in an open crawl space here is in the coldest part of the building for months at a stretch with nothing to relieve it, and establishing where the runs actually go is the first thing that happens rather than an afterthought. On several of these jobs that exposure rather than the cold floor is what justifies the work, and an owner is better served hearing that plainly than being sold on comfort alone.
This is not an efficiency job, which is why a posting cycle is the wrong test
The usual objection here is that nobody stays long enough to see a return, and for a lot of envelope work that is a fair point. It is the wrong test for a crawl space. What an open, damp, vented void under a house does is not primarily waste heat, it is put moisture into the floor structure, the sill and the joist ends year after year. That damage does not reset when a household is posted out, it accumulates in the building and it is priced into the house when it eventually sells. So the question in Cold Lake is not whether this pays back inside a posting, it is whether the fabric is being handed on in the condition it was received in. That is a different question and it has a clearer answer.
Cover the ground, then the perimeter, then the foam
Bare earth releases moisture continuously, so a sealed barrier goes down first, then the perimeter walls, and then the space is inside the building rather than outside it. Where the space is reachable and used, a Cold Lake crawl space also needs an ignition barrier or a thermal barrier over the foam, and which applies is established on the visit rather than assumed.
Crawl Space Spray Foam Insulation Cold Lake: Common Questions
Why does one room have cold floors when the rest of the house is fine? That room is over an addition on a shallow void rather than over the basement.
Why did a pipe freeze under there? Then where the lines run matters more than anything else, and it is the first thing looked at.
Does the foam need covering? Where the space is accessible, yes, with an ignition barrier or a thermal barrier depending on use.
Size the assembly with the R-value calculator, then get a free Cold Lake quote. More on Crawl Space Spray Foam Insulation Alberta.