Mountain architecture likes a vaulted ceiling. Open the door of a Canmore house built in the last three decades and there is a decent chance the living space runs up to the ridge with exposed beams and a wall of glass facing the peaks. It looks the way people want a Bow Valley house to look, and it removes the one thing that makes a roof forgiving: the attic.
No attic means no margin
A flat ceiling with an attic over it gives you room for depth, room for ventilation and room to fix a mistake later. A vaulted ceiling gives you the depth of the rafter and nothing else. Everything - the insulation, the air seal, the vent channel if there is one - has to fit inside that single cavity, between a finished surface you do not want to disturb and a roof deck carrying a mountain snow load. There is no slack, which is why the material choice stops being a preference.
Why closed-cell belongs in a cavity this tight
At roughly R-6 to R-7 per inch, closed-cell gets more performance out of a shallow rafter than anything else available, and at about two inches it is already functioning as the vapour control layer. Sprayed against the underside of the deck it adheres, so there is no gap behind it for air to loop through and no path for warm indoor air to reach cold sheathing. In a vaulted assembly that matters enormously, because a damp roof deck in a vault is invisible until the finish below it stains.
The batt-and-poly vault is the failure we are usually called about
A rafter stuffed with batt, a poly sheet stapled over it and drywall screwed to that is the assembly that disappoints most reliably in this valley. Air gets past the poly at every staple, every seam and every light fixture, carries indoor moisture to a deck that is cold because the roof above it is holding snow, and condenses there. Nobody sees it. What they see is a cold ceiling, frost on the window heads and eventually a mark on the drywall, and by then the deck has been wet for several seasons.
Ceilings between stacked units are a different job
In the attached and stacked buildings that make up so much of Canmore's newer housing, the ceiling in question is often not a roof at all - it is somebody's floor. The complaint there is rarely heat. It is footsteps, voices and a unit above that runs on a nightly rental schedule. That is an acoustic assembly, and open-cell foam at about R-3.5 to R-3.8 per inch is the relevant product because it is the one that absorbs rather than the one that seals. Foam alone is not a floating floor and will not stop impact noise, so say which problem you are solving.
Beams, lights and the details that leak
Exposed timber work is beautiful and it crosses the air barrier. So does every recessed light in a vault, every speaker cut into it and the ridge detail where two slopes meet. Those penetrations are the whole reason a vaulted ceiling underperforms its paper R-value, and they are the part of the job that cannot be done from a catalogue - it has to be sprayed around the actual shape of the actual building.
The crew on your job
Ceiling spray foam insulation Canmore is quoted, scheduled and sprayed by us. Our own installers are on the job, and the number you are given is the number we stand behind.
Ceiling Spray Foam Insulation Canmore: Common Questions
Our vaulted ceiling is always cold. Is it short of insulation? Possibly, but air leakage through the lights, beams and ridge is the more common cause, and depth does nothing about that.
Do we have to take the ceiling down? Sometimes, if the only access to the cavity is from inside. We would rather tell you that before you compare quotes than after.
Can foam fix noise from the unit above? It reduces airborne noise. Impact noise from footsteps needs decoupling as well, and we will say so rather than sell you foam for it.
How much does ceiling spray foam insulation cost in Canmore? Priced per board foot of sprayed area, so a shallow vault at high R-value costs what the depth and the area say it costs. Access and whether a finish has to come off is the real variable.
How do I get a ceiling spray foam insulation quote in Canmore? Tell us whether it is a vault under a roof or a ceiling under another unit. Those are two separate trades wearing the same name.
Size the assembly with the R-value calculator, then get a free Canmore quote. More on Ceiling Spray Foam Insulation Alberta province-wide.