Pole barn spray foam insulation in Barrhead is post-frame work, and a post-frame building has no cavities in the sense the insulation trade means. It is a line of posts, horizontal girts spanning between them, and steel screwed to the outside. The space between the posts is wide open, the girts stand proud, and the depth available changes depending on where you put the tape. Nothing manufactured to a size fits it, which is most of the reason these buildings end up sprayed.
The site is doing more damage than the design
The thing that separates a pole barn around Barrhead from one on open prairie is the ground it is standing in. Yards here are sheltered and often partly treed, the canopy keeps the sun off the soil beside the building, and snow banks up along the walls rather than being carried away. That soil goes into winter wet, stays frozen wet, and comes out of spring wet, with a drift melting into it for weeks.
For a building whose structure is literally buried in that soil, this is the governing fact. The posts are in permanently damp ground. The skirt or splash board at the base is under a drift for a third of the year. Daylight along the bottom of a wall is the most common single finding we have in older pole barns in this district, and it is a consequence of that band being wet, frozen, thawed and loaded season after season until the board has lifted or rotted away from the steel.
That has to be rebuilt before any foam goes on. Spraying against a board that is on its way out buys a few years and buries the repair.
With no wind, the building ventilates through its own height
On an exposed site, air is pushed through a barn from the windward wall to the leeward one. Behind a shelterbelt that does not happen, and what replaces it is the stack: warm air rises to the top of a tall volume and leaves through the eave and the ridge, drawing cold air in through the open base to replace it. The circuit runs on temperature difference alone, which means it runs hardest on the coldest nights and does not stop.
Practically, that means the two ends of the circuit are the two places worth sealing first. The base, which has to be repaired anyway. And the eave, where the wall plane meets the roof plane and the two steel profiles never actually close against one another. Seal those and a pole barn behaves differently before a square foot of wall has been insulated.
Seal it before deciding how to heat it
Most owners come to us because they want to put heat into a pole barn. The order matters more than the R-value. An open-based, open-eaved post-frame building cannot be heated economically at any thickness, because it is pumping its own air volume out through the roof all day. Repair the base, close the eave, spray the shell, then size the heater against a building that will hold what it is given.
On a tall wall there is a sensible division of labour: enough sprayed foam against the steel to keep the dew point inside the layer and seal the assembly, with a cheaper material inboard of that to make up the thickness. The foam does the two jobs only foam can do in this geometry; the rest is just resistance.
One caution specific to post-frame. Do not entomb the posts. A post in damp ground needs to be able to dry inward, and burying the whole thing in closed-cell foam takes that away. We spray the wall and treat the posts as what they are, which is structure sitting in wet soil.
Pole Barn Spray Foam Insulation Barrhead: Common Questions
There is daylight along the bottom of our wall. The splash board has rotted or shifted. In this country it has spent years under a drift, and it has to be rebuilt before anything is sprayed over it.
Can batt be used in a post-frame wall? Only with a liner holding it and a properly detailed air barrier, and that assembly is the one we are most often called in to replace. There is no real cavity for it.
Is it worth it if we only heat the building occasionally? Yes — and sealing is exactly what makes occasional heating practical, because an unsealed post-frame building turns its whole air volume over continuously.
How much does pole barn spray foam insulation cost in Barrhead? Sprayed area prices by the board foot at the chosen depth, so wall height and whether the roof is included set the scope. Rebuilding the base beforehand is a separate line and usually needed.
How do I choose a pole barn spray foam contractor in Barrhead? Ask what they plan to do at the splash board and at the eave, and ask whether they intend to spray over the posts. The third answer should be no.
Size the assembly with the R-value calculator, then get a free Barrhead quote. More on Pole Barn Spray Foam Insulation Alberta province-wide.