Ceiling spray foam insulation in Langdon is mostly not attic work. It is the ceilings that have no attic over them: the vaulted great room in an acreage house, the sloped ceiling following a roof line, the flat ceiling hung under the trusses of a shop, and the ceiling of a room with heated space above it. Those assemblies have no reservoir of open space to pile material into, which is why they end up needing foam when a conventional attic does not.
A vaulted ceiling has nowhere to put depth
Langdon's acreage and custom plans are fond of vaulted and cathedral ceilings, and the geometry is unforgiving. The rafter or truss depth is all the room you have, part of it may be wanted for a vent channel, and the ceiling finish is fixed to the underside. Open-cell at roughly R-3.5 to R-3.8 per inch cannot reach a sensible value in that depth. Closed-cell at roughly R-6 to R-7 per inch can, which is the whole reason this assembly turns into a foam job rather than a batt job.
Unvented means the material does two jobs
If the cavity is being filled rather than vented, the assembly has to control vapour as well as heat, because there is no air channel above to carry moisture away. Closed-cell handles that: at around two inches it is a vapour barrier in its own right, and it adheres to the deck so there is no gap for air to move in. What fails in this position is a fibrous insulation pushed tight to the deck with a poly sheet below it. Warm moist indoor air finds the seams, reaches cold sheathing and has nowhere to dry to.
The flat ceiling under a shop roof
On the outbuilding side the ceiling is usually a liner hung beneath open trusses, and the question is whether to insulate at the liner or at the roof deck. Insulating at the liner is cheaper and keeps the heated volume small, which suits a building used in bursts. Insulating at the deck brings the truss space inside the envelope, which suits a building with ducts or a mezzanine up there. Getting this decision backwards is how an owner ends up heating a triangular volume nobody uses.
Do not mix assemblies on one roof
The common failure we find on Langdon houses with complicated roof lines is a vented flat section meeting an unvented sloped section with nothing resolving the transition. Air moves from one into the other, the vent path dead-ends, and the junction becomes the cold line and the condensation line at once. Whichever strategy a given roof uses, it has to be carried through the whole plane, and on a custom roof that is a drawing job before it is a spraying job.
Who quotes it and who sprays it
We do ceiling spray foam insulation Langdon ourselves. We scope and quote it, we book it, and our own installers spray it -- one company, one point of contact.
Ceiling Spray Foam Insulation Langdon: Common Questions
Our vaulted ceiling is cold and there is no attic. What can be done? Closed-cell applied in the available depth gets a real R-value into a shallow cavity and seals it at the same time, which is what that assembly needs.
Can we just stuff batt up against the roof deck? That is the assembly that most often causes moisture problems in an unvented ceiling. Without a vent channel the moisture has nowhere to go.
Should a shop ceiling be insulated at the liner or at the roof? At the liner if the building is heated occasionally and the truss space is empty. At the roof if there is mechanical equipment or storage up there.
How much does ceiling spray foam insulation cost in Langdon? It is priced per board foot of sprayed area at the depth the assembly needs, and a shallow cavity needing closed-cell carries a different depth than an open attic would. The scope follows the geometry of the roof.
How do I choose a ceiling spray foam contractor in Langdon? Ask them to describe the vent path, or to say plainly that there is not going to be one. An installer who cannot answer that is guessing at the assembly.
Size the assembly with the R-value calculator, then get a free Langdon quote. More on Ceiling Spray Foam Insulation Alberta province-wide.