Post-frame buildings are the default on yards around Athabasca because they go up quickly, span well and do not need a full foundation. That last point is exactly why insulating one is different from insulating anything else. A pole barn does not sit on a continuous wall. It sits on posts set into the ground, with the cladding running down to a skirt board near grade, and the detail at the bottom of that wall decides whether the whole job works.
The bottom of the wall is the job
On most of these buildings the wall stops at a splash plank or skirt board sitting on, or slightly into, the ground. Below and around it is soil, gravel, and in a building that was built up over the years a floor poured later that may or may not meet the wall. That junction is a continuous gap around the entire perimeter of the building, it is right at the level where cold air collects, and it is where the drift comes in. Insulating the walls and the ceiling beautifully while leaving that line open produces a building with a cold floor and a draught at ankle height, which is precisely where anyone standing in it will notice.
Do not bury the posts in foam
The posts are structural timber in contact with the ground, and they need to be able to dry. Encasing a post in closed-cell foam from top to bottom traps whatever moisture is in it and removes any route for it to leave. Around the base in particular, the detail has to seal the air path without sealing the timber into a permanently wet condition. That is a judgement made on the building rather than from a diagram, and it is the main reason a post-frame building should not be quoted the same way as a steel one.
Spraying between the girts, and what that leaves
Post-frame walls are clad on horizontal girts, so the inside face is a grid of timber with the back of the cladding behind it. Foam sprayed into those bays seals the cladding and fills the space, which is a large improvement over nothing and leaves the girts themselves as a path through the assembly. Timber bridges far less than steel does, so this matters much less here than it does in a pre-engineered building, but it is worth knowing that the wall is not continuous unless the foam is carried over the face of the girts as well.
The ceiling plane or the roof deck
Same decision as any tall building and it is usually easier to answer here. If the trusses are open and the space above is not used, closing at the bottom chord with a flat plane is cheaper and heats far less air. If the building is being used to its full height, or if services run up in the roof, the deck is the surface to treat. In either case the junction where that plane meets the top of the wall has to be continuous, and in a post-frame building that junction runs over and around the top of every post.
Condensation before comfort
Most pole barns on these yards are storage rather than occupied space, and the honest objective is to stop them sweating on what is inside. An uninsulated steel roof over a building full of equipment or hay will produce water on a cold clear night and drop it on the contents. Foam in contact with the underside of the cladding removes the cold surface. That is often the entire project, with no heat involved at all.
The doors and the size of the volume
Post-frame buildings tend to be large, and a large volume is expensive to warm, both in use and during the work itself, since the shell has to be tempered before anything can be sprayed in winter. Combined with doors sized for machinery, that pushes most of these buildings toward being kept dry or kept above freezing rather than heated. Deciding that first keeps the thickness and the price sensible.
The crew on your job
We take care of pole barn spray foam insulation Athabasca end to end -- the assessment, the quote, the scheduling and the spraying. Our crews do the work.
Pole Barn Spray Foam Insulation Athabasca: Common Questions
Why is the bottom of the wall such an issue? Because a post-frame building has no continuous foundation. The cladding stops near grade and that line is open around the whole perimeter.
Can you spray right over the posts? Not indiscriminately. Posts in ground contact need to be able to dry, so the base detail seals air without sealing the timber into permanent damp.
Do we have to heat it afterwards? Usually not. Most of these buildings only need to stop condensing on their contents, and that is achieved by putting insulation in contact with the cladding.
How much does pole barn spray foam insulation cost in Athabasca? It follows wall and roof or ceiling area at the chosen thickness, and the volume matters because a big building needs tempering before winter work. The perimeter detail is quoted as part of the wall, not as an extra.
How do I choose a pole barn spray foam contractor in Athabasca? Ask what they are doing at the skirt board and around the posts. A contractor who treats a post-frame building like a steel one will get both wrong.
Size the assembly with the R-value calculator, then get a free Athabasca quote. More on Pole Barn Spray Foam Insulation Alberta province-wide.