About 70% of homes in Stettler were built before 1991. That one number sets the whole residential conversation here, because it means most of the houses in town were built to a standard that treated air leakage as ventilation rather than as a defect, and they are now being asked to perform like modern houses on a prairie lot with no shelter.
Two loads, not one
Heat leaves a house two ways. It conducts through the assemblies, and it rides out on air that is leaving through gaps. Insulation addresses the first and does nothing about the second. In a sheltered city neighbourhood the second one is modest. On open country with sustained wind, it becomes the larger of the two, and the house that got a thick attic and still feels draughty is the ordinary outcome of treating only half the problem.
Where the air actually leaves a house of this age
The rim joist, all the way around the basement, where the floor structure sits on the foundation. The top plates of interior walls where they meet the attic. The plumbing stack and the bath fan housings. The chase around an old chimney. Where the service entries come through the wall. None of these are large individually and together they are a continuous opening that is working every hour of the winter.
The order that pays
Air sealing first, in the attic and at the rim joist. Then depth in the attic once the plane below it is sealed. Then the basement or crawl space if the floors are cold. Then the walls, which are the most expensive and most disruptive surface and belong last unless the siding is coming off anyway. Working in that order means each stage is still worth doing when you get to it, which is not true in reverse.
What foam contributes and what it does not
Closed-cell foam gives roughly R-6 to R-7 per inch, adheres so there is no gap behind it, and is a vapour barrier at about two inches, which lets it do the sealing and the insulating in one application in places nothing cut to size will fit. Open-cell runs about R-3.5 to R-3.8 per inch and earns its place in interior work and where sound matters. Neither of them is waterproofing, and neither of them is a reason to skip the mechanical ventilation a tighter house needs.
Cold rooms tell you where to look
Which room is cold is diagnostic. A cold floor along an outside wall points at the rim joist. Cold ceiling corners upstairs point at the eaves and wind washing in the attic. A cold room over the garage is a floor assembly, not an attic. Cold walls on one side of the house only usually means that side faces the prevailing wind. Naming the room when you call changes what we come to look at.
We take care of the work
We are the contractor on residential spray foam insulation Stettler, not a referral service. We quote the job, schedule it and stand behind it, and our own installers carry it out.
Residential Spray Foam Insulation Stettler: Common Questions
We added attic insulation and the house is no warmer. Why? Because the loss was air, not conduction. New depth laid over an unsealed ceiling sits above the leaks rather than closing them.
What single job gives the best return on an older house here? Almost always the rim joist. It is the leakiest accessible part of a house of this vintage and it is a small scope.
Do the walls need doing? Usually last. The walls are the most disruptive surface, and the attic, rim joist and basement give more per dollar first.
How much does residential spray foam insulation cost in Stettler? It is priced per board foot over the sprayed area, so the number follows area and the thickness the assembly needs. On a house built before 1991 the practical variable is how much existing finish or insulation has to come out before anything can be sprayed.
How do I choose a residential spray foam contractor in Stettler? Ask which room you should name first, and what order they would do the work in. A quote that starts with the walls on a 1970s house here is quoting the expensive end.
Size the job with the R-value calculator, then get a free Stettler quote. More on Residential Spray Foam Insulation Alberta province-wide.