Ceiling spray foam insulation in Lloydminster is for the parts of a house with no attic over them: a vaulted room, an addition with a low-slope roof, the link between two roof levels. There is no space to work in on any of these, which is what makes them a different job from an attic.
A flat roof added to a pitched house
The commonest example in this town is an addition with a nearly flat roof stuck onto a house with a conventional pitched one. It was cheap to build, it works, and it has almost no depth in it. The room under it is the cold one in the house, and no amount of adjusting the heating fixes that because the problem is a thin assembly rather than a supply problem. That room is usually the reason somebody calls about this at all.
Movement between two structures that were built apart
On clay ground the addition and the original house do not always move together, because they frequently sit on different foundations put in decades apart. The junction between the two roofs is where that shows: a gap that opens and closes seasonally, right at the point where the low roof meets the wall of the taller building. That junction is both the hardest thing to seal and the most important, and it is worth being clear that it is where the attention goes rather than the middle of the roof.
The rafter depth is the entire budget
In an attic the answer to poor performance is more material. Here there is nowhere to put it. The depth of the rafter is all the space there is, so the only questions left are how much resistance each inch delivers and whether the plane is sealed. Closed cell foam is the assembly that fits the constraint, because it gives the most per inch and it seals in the same pass rather than needing a separate air barrier taking up room that does not exist.
One assembly or the other, chosen at the start
A shallow roof is either vented or it is unvented, and it has to be built as one of those on purpose. A vented assembly needs a clear, continuous path from the eave to the high side, and on a low-slope Lloydminster addition that path is frequently interrupted by the structure or blocked by whatever the original builder did. Where it can be kept genuinely clear, venting works. Where it cannot, the right answer is an unvented assembly with the foam in continuous contact with the deck and nothing behind it. What does not work is a bit of both, which is what most failed shallow roofs turn out to be.
Ceiling Spray Foam Insulation Lloydminster: Common Questions
Our addition is always cold. Can we add insulation? There is nowhere to add it. In a shallow assembly the question is performance per inch, not depth.
Where does the work concentrate? The junction where the low roof meets the taller wall. That is where the movement and the leakage are.
Vented or unvented? One or the other, decided at the start. A mixture of the two is what most failures turn out to be.
Size the assembly with the R-value calculator, then get a free Lloydminster quote. More on Ceiling Spray Foam Insulation Alberta.