About 72% of homes in Claresholm were built before 1991 — the pre-1991 stock is the core spray-foam retrofit market. That is a high share by Alberta standards and it describes a particular kind of house: a modest bungalow or storey-and-a-half on the old rail townsite grid, framed with dimensional lumber, sheathed with planks, and added onto at least once.
A leaky house follows the weather instead of the thermostat
The thing that makes a Claresholm house uncomfortable is not usually how cold it gets. It is how fast the outside changes. In the chinook belt the outdoor temperature can climb twenty-five degrees before lunch and give most of it back overnight, repeatedly, through the whole winter.
A tight house is largely indifferent to that. The air inside it is the air the furnace and the ventilation put there, and the structure has enough inertia to ride out a swing. A leaky house cannot. A large part of its air changes come through gaps in the shell, and the rate of that exchange is set by the temperature difference and the wind — so it is at its highest exactly when the swing is biggest. The house tracks the outside. People describe it as the furnace never catching up, or as the house being fine one day and cold the next, and that is what they are feeling.
That is the honest case for spray foam on this stock: it insulates and air seals in a single pass, so the air path and the thermal path get dealt with together, and it is the air path that is actually driving the complaint.
What these houses are made of, and why it matters
Plank sheathing under the siding with no building paper worth the name. Full-depth two-by-four walls with batt that has settled or was never there. A rim joist detail that is just the end of the floor joists sitting on a sill. Attics with no raised heel, so the insulation tapers to nothing over the exterior wall. Interior partitions that are open from the basement to the attic at the top plate.
None of that is a defect in workmanship. It is how houses were built, and it means the air paths through one of these houses are continuous and vertical rather than localised. Sealing a window does very little when the wall cavity it sits in connects the basement to the roof.
Additions complicate the envelope
Nearly every house here has a back addition, an enclosed porch or a converted summer kitchen. Each one created a junction: an old exterior wall now sitting between two interior spaces, a step from basement to crawl, a change in floor level, a roof tying into a wall. Those junctions are where we find the real leakage, and they are also the reason two houses on the same street need different work.
The order that gets results without moving out
We will nearly always recommend starting below the main floor — the rim joist and the above-grade band of the foundation wall, then the crawl under the addition. That is the leakiest accessible part of these houses, it requires no demolition, and nobody has to move out for it. The attic perimeter and penetrations come next. Walls come last, because they are only economic when the siding is off or the interior is already open.
Open cell and closed cell do different jobs, and we will say which goes where. Closed-cell at R-6 to R-7 an inch and its own vapour barrier at roughly two inches is the below-grade and exterior product. Open-cell at R-3.5 to R-3.8 an inch is lighter, vapour-permeable and better acoustically, which makes it the interior and sound product.
We take care of the work
On residential spray foam insulation Claresholm, the people who quote the work are the people who do it. We insulate it ourselves and we answer for the result.
Residential Spray Foam Insulation Claresholm: Common Questions
Why does the house feel fine some days and cold others? Because a leaky house exchanges air at a rate set by the weather, not by you. In a chinook belt that rate changes constantly, and the house follows it.
Where should we start? Below the main floor. The rim joist, the top of the foundation wall and the crawl under the addition are the leakiest accessible areas and need no demolition.
Are the walls worth doing? Only when they are open — a re-side or an interior renovation. Opening a wall solely to insulate it is rarely the best use of the money on this stock.
How much does residential spray foam insulation cost in Claresholm? It is priced per board foot over the sprayed area, so area and depth drive it. On an older house, access and whether anything has to be removed first is usually the bigger variable.
How do I choose a residential spray foam contractor in Claresholm? Ask what they would do first and why that. On a Claresholm house the answer should be below the main floor, and a contractor who starts with the attic on every house is not looking at yours.
Size the assembly with the R-value calculator, then get a free Claresholm quote. More on Residential Spray Foam Insulation Alberta province-wide.