Spray foam insulation for new construction in Didsbury is a smaller share of the work than it is further down the corridor, and the builds that do happen here have a character of their own.
Infill and replacement rather than subdivision
New building in this town is mostly one lot at a time. A house replacing one that came down, a build on a gap in an established street, a shop or small commercial unit going up on the edge. That is different from a phase of forty houses, and it means the person building is usually the person who is going to live or work in the finished building. They are making decisions for the long term rather than for a sale, which changes what is worth specifying.
The one stage where the assembly is still open
The argument for doing this at the framing stage is simply access. Every rim, every top plate, every junction between floors, and the whole roof plane are visible and reachable exactly once. Sealing and insulating them then costs a fraction of reaching the same details later, and several of them cannot be reached properly again at all. Anybody who has retrofitted an older Didsbury house knows what the alternative looks like, which is why owner-builders here tend to be receptive to this.
Sealing the building changes what the ventilation has to do
A properly sealed new building does not exchange air by accident, and that is the point of it. It does mean the ventilation becomes a designed system rather than something that happens through gaps, and that belongs in the plan from the beginning rather than being addressed at the end. Said plainly: this work makes the building tight, and a tight building needs its air changes provided deliberately.
Building next door to something a century older
A new build on an established street here often shares a lot line with a house that predates it by a hundred years. Where the two are close, the wall facing the neighbour is frequently the one that cannot be re-accessed once the build is finished, and it is worth treating that wall as a one-chance detail. The same applies to any wall built tight to a boundary, which on the older lots in this town is common. It is worth walking the site with that in mind before the framing goes up, because the surfaces that will be permanently unreachable are obvious at that stage and very close to impossible to address afterwards.
Spray Foam Insulation New Construction Didsbury: Common Questions
Why do it at framing rather than later? Access. Several of these details cannot be reached properly again once the building is closed.
Does a sealed house need mechanical ventilation? It needs its air changes designed rather than accidental. That belongs in the plan early.
How do you insulate the boundary wall when building on a tight lot? Then the boundary wall is a one-chance detail. Treat it as such before the cladding goes on.
Size the assembly with the R-value calculator, then get a free Didsbury quote. More on Spray Foam Insulation New Construction Alberta.