Ceiling spray foam insulation in Morinville splits along the same line as everything else in this town, and the shape of the ceiling is what gives it away: the older half has flat ceilings with a roof space above them and the newer half has vaults, raised sections and rooms open to the roof.
A vaulted ceiling has almost no space above it
Where a ceiling follows the roof line there is only the depth of the rafter between the room and the outside, and no accessible space at all. That limits how much can go in before anybody chooses a product, it removes the option of working from above, and it makes every penetration through that surface a direct one. A recessed light in a flat ceiling opens into an attic. The same fitting in a vaulted ceiling opens into a sealed cavity that has nowhere to lose its moisture.
Height is not the same as heat loss, and both get blamed
A tall room stratifies, so the air at head height is cooler than the air at the top and people describe the room as cold when the house is delivering what it was asked for. That is a distribution problem rather than an envelope one, and no amount of insulation fixes it. The envelope question in a high Morinville room is separate and narrower: whether the surfaces enclosing that volume are continuous, particularly where a high wall meets a low roof at the side.
Where a flat ceiling and a raised one meet
On the newer half the ceiling frequently steps: a flat area, then a raised section over part of the room. The vertical face between the two is a short wall standing inside the roof space, and it is insulated and sealed in a way that varies enormously between builders. It is completely hidden, it runs the width of the room, and it is one of the most common places where an otherwise well-built Morinville house loses its continuity.
What the older half is actually dealing with
A flat ceiling with an attic over it is the easier case and it comes with its own list: the hatch, the top of every interior wall, the fittings that were changed since, and the chase around any duct that runs up through the ceiling. All of it can be reached from above without disturbing a room, which makes it cheaper per unit of improvement than anything available on the other half of town.
Ceiling Spray Foam Insulation Morinville: Common Questions
What if the ceiling follows the roof? Then the depth available is fixed by the rafter, and nothing can be done from above.
Why does the high room feel cold? Frequently stratification rather than heat loss. Both get checked before anything is quoted.
What about a raised section over part of the room? The short wall between the two levels is hidden in the roof space and is worth looking at.
Size the assembly with the R-value calculator, then get a free Morinville quote. More on Ceiling Spray Foam Insulation Alberta.