About 81% of homes in Fort Macleod were built before 1991 — one of the higher shares anywhere in Alberta, in a town that was laid out around a mounted police post in the 1870s. Residential spray foam insulation in Fort Macleod is retrofit work on houses that have been heated four different ways, and the leftovers of each one are still in the walls.
The house that has had four heating systems
A house of this age started with solid fuel. A chimney came up through the middle of it, with a flue thimble in one or two rooms. Then an oil furnace went in, which meant a new flue liner and a tank line through the cellar wall. Then gas, which meant a different vent and a gas line. Somewhere along the way a forced-air system was added, and ducts were driven up through closets and cut through the top plates to get to the second floor.
Every one of those changes left a hole. The abandoned chimney chase is often open from the cellar floor to the roof deck. The old thimble is behind a sheet of tin in a bedroom wall. The disused duct runs are open shafts. Nothing was sealed on removal, because nobody sealed anything on removal.
Why that matters more than insulation depth
Those shafts connect the coldest part of the house to the warmest and run vertically, which is the one orientation that makes them effective. Warm air leaves at the top, cold air is drawn in at the bottom, and it happens every hour of the winter whether or not there is a foot of material in the attic.
It is the reason topping up the attic on a house like this so often disappoints. The new depth sits above a ceiling with half a dozen open shafts through it. The money was spent on the right material in the wrong place.
The order we would actually work in
Find and close the vertical paths first — the chimney chase, the old flue openings, the duct shafts, the plumbing stack, the gaps at the top of interior partitions. These are small volumes of foam in locations nothing cut to size can seal, and they are the highest-return work in the house.
Then the band at the top of the cellar wall, which is the leakiest accessible surface in nearly every house of this era.
Then the ceiling plane, sealed before anything is added on top of it.
Walls last, and only when something has already opened them. On this stock the walls are shallow, plastered and intact, and opening them is a renovation rather than an insulation job.
Which product does which job
Closed-cell is the one that goes against masonry, against the cellar wall, into the band and into the chases — roughly R-6 to R-7 per inch, and a vapour barrier at about two inches, which is what you want on a cold surface. Open-cell is about R-3.5 to R-3.8 per inch and belongs in interior partitions where sound matters more than moisture. Most houses here get both, in different places, for different reasons.
Insulation on its own does not stop air moving. Air sealing does. In a house with no air barrier anywhere, that distinction is the whole project.
Living in it while the work happens
Nobody wants to move out of a house for insulation. The good news is that the highest-value items on this list are reached from the cellar and the attic hatch, not from the living space. A house can be substantially improved without a single room being taken apart, and that is usually what we recommend doing first and seeing how it feels before anything else is decided. We quote the job, schedule it and stand behind it.
Residential Spray Foam Insulation Fort Macleod: Common Questions
We topped up the attic and nothing changed. Why? Because depth does not stop air, and on a house of this age there are usually open vertical shafts through the ceiling that the new material simply sits on top of.
What is the abandoned chimney doing to the house? Acting as a flue for the house itself. It connects cellar to roof and moves air continuously. Sealing it is small work with a large effect.
Do the walls need doing? Usually not first, and sometimes not at all. They are shallow and intact, and the return is lower than the reachable items.
How much does residential spray foam insulation cost in Fort Macleod? It is priced by sprayed area and thickness, so a package of small sealing items costs very differently from a whole-surface job. On this stock the small items are where the value sits.
How do I choose a residential spray foam contractor in Fort Macleod? Ask what they will do about the old flues and duct shafts. A quote that only prices open attic area has priced the easy half of an old house.
Size the job with the R-value calculator, then get a free Fort Macleod quote. More on Residential Spray Foam Insulation Alberta province-wide.