Attic spray foam insulation in Rimbey is mostly work on the older residential core, and on those houses the trouble concentrates in a band about two feet wide running right around the outside edge of the attic. The middle of the attic is rarely the problem. The eave is.
Why the eave is the weak spot on this housing
A roof framed with a conventional truss or with rafters sitting straight on the top plate leaves very little vertical room where the roof meets the wall. There is a soffit vent that has to stay clear, insulation that wants to be full depth, and perhaps six or eight inches of height to fit both into. Something gives, and it is almost always the insulation. The result is a house that is well insulated across the ceiling and barely insulated along every exterior edge of it, which is precisely where the heat loss shows up as a cold outside wall and a draughty upstairs.
Snow that stays on the roof is the reason it matters
In a climate that thaws every few days, a roof sheds its snow and the eave gets a rest. Central Alberta does not work that way. Snow lands, more lands on it, and the pack sits there through weeks of continuous cold. That pack is an insulating blanket over the roof deck, so any heat leaking into the attic warms the deck underneath it and melts the layer in contact with the shingles. The water runs down to the cold overhang, where there is no house underneath to warm it, and refreezes. The ice at the eave is not a roofing fault. It is a report on the ceiling.
What foam does in the eave and what it does not
Sprayed at the top plate, foam takes a thin space and makes it count, because it delivers roughly R-6 to R-7 an inch in closed-cell form and seals the junction at the same time. That junction leaks air as well as conducting heat, and insulation of any kind does nothing about air movement. Baffles go in first so the soffit path survives, foam seals the plate and the first courses of framing, and the blown-in depth across the open flat carries on over the top of it. Spraying the entire underside of the roof deck is a different and far larger job, and on most houses in town it is not the one being asked for.
The other openings worth closing while we are up there
The hatch, which on this stock is usually a bare panel with nothing on its back and no gasket in its frame. The plumbing stack. The bathroom fan, which on older houses surprisingly often discharges into the attic rather than through the roof. The top plates of interior partition walls, each one an open path from inside the wall cavity to the attic. None of these is large. Together they run continuously for six months.
Getting at it on an older house
Access is a real constraint here. A hatch in a bedroom closet with a few inches of clearance at the top of the stairs decides how much of the attic can actually be reached, and it decides it before anyone quotes. Knowing where the opening is and what is stored under it is worth mentioning on the phone.
We take care of the work
You are dealing with the contractor directly on attic spray foam insulation Rimbey. We quote the job, we schedule it, and our own installers do the work.
Attic Spray Foam Insulation Rimbey: Common Questions
We have plenty of insulation. Why is the house still cold at the walls? Because depth across the middle of an attic does nothing for the edge of it. The eave is where the space runs out and it is the part you feel from inside.
Does ice at the eave mean the roof needs work? Usually not. It means heat is reaching the roof deck under a snow pack that will not shed. The fix is in the attic.
Does the whole roof deck need spraying? Rarely. Sealing the perimeter and the ceiling penetrations, then topping up depth, solves most of what gets reported.
How much does attic spray foam insulation cost in Rimbey? The sprayed portion is priced per board foot and the blown-in depth on top is priced separately, so the number follows the area and the target R-value rather than the size of the house.
How do I choose an attic spray foam contractor in Rimbey? Ask what they intend to do at the eave. A quote that only describes depth over the flat has priced the easy half of the attic.
Size the assembly with the R-value calculator, then get a free Rimbey quote. More on Attic Spray Foam Insulation Alberta province-wide.