Basement spray foam insulation in Strathmore is work on relatively young foundations, and the thing that distinguishes them is not the wall itself but what the wind above ground is doing to the whole building.
Wind pressurises a house, and the basement is where the air arrives
On an open lot the wind does not just cool the building, it pressurises one side of it and draws on the other. Air pushed in high has to leave somewhere, and air drawn out high has to be replaced from somewhere, and on most houses the somewhere is the lowest and leakiest part of the building. That is why a basement on an exposed Strathmore lot feels draughty in a way the numbers do not predict, and why treating it changes how the whole house behaves rather than just the room downstairs.
What is behind the wall on a house of this age
It is usually a stud wall framed off the concrete with batt between the studs and a poly sheet stapled over it, which is exactly what the code of the day asked for. The difficulty is that it puts a vapour barrier on the warm side of a surface that is cold, with an air gap behind it that connects to the rim joist above. Anything that condenses there has nowhere to go. It is not a defect anybody created, it is an assembly that has since been understood better, and on a young house it is frequently still in perfect condition and still doing that.
Whether the existing wall comes off
That decision drives the cost more than anything else and it is made on what is found rather than on preference. Where the framing is sound, dry and tight to the concrete, some of it can stay. Where there is a gap behind it, or any sign that moisture has been sitting in the cavity, it comes out, and that is real hours before any foam is sprayed. Asking for that to be an explicit line in the quote is the single most useful thing a household can do when comparing two numbers.
Meltwater has nowhere to go on ground this flat
The land here has very little fall in it, which matters more to a foundation than the depth of the frost does. On sloping ground the spring melt runs away from a house. On flat ground it sits, and it sits at exactly the moment the soil below is still frozen and cannot take it, so the water stands against the wall for days rather than draining through. That is why a Strathmore basement that is dry all winter can take water in April, and it is why grading and where the downspouts discharge get looked at before any insulation is priced. Foam over a wall that is still taking water in spring seals the problem in rather than solving it.
Basement Spray Foam Insulation Strathmore: The Covering Requirement
Where a Strathmore basement is going to be a living space, the foam has to be covered by a thermal barrier, which in practice is the drywall going on. It is worth settling before pricing, because a basement insulated for storage and one insulated as a family room are different scopes, and on a young house where the development is probably coming anyway, doing both as one job is considerably cheaper than doing them two years apart. More on thermal barrier vs ignition barrier.
Basement Spray Foam Insulation Strathmore: Common Questions
Why is the basement draughty in a house that is not old? On an exposed lot that is usually wind pressurising the building rather than the wall itself.
Does the stud wall have to come out? It depends what is behind it, and that is the biggest single variable in the price.
Should we insulate before finishing it next year? Then do both as one job. It is much cheaper than insulating now and finishing later.
Size the assembly with the R-value calculator, then get a free Strathmore quote. More on Basement Spray Foam Insulation Alberta.