Pole barn spray foam insulation in Edson is applied to the inside face of the cladding, across the girts and posts together, because a post-frame wall has no cavity to put anything into. These are the default outbuilding on acreages around here and they arrive with a specific set of problems.
Post-frame buildings under a real snow load
These are light structures carrying a heavy seasonal load in this town, and that is worth understanding before anything is added to them. Foam is a light assembly and adds very little, but the conversation about what the roof is carrying belongs at the start, particularly on an older building or one that has been extended. Where there is any doubt, that gets established before the envelope work rather than discovered afterwards.
Condensation on the underside of the cladding
The failure everybody recognises is water forming on the inside of the roof sheet and dripping onto whatever is stored below. The steel reaches outside temperature, the air in the building holds more moisture than the owner thinks, and the two meet. Batt hung under the purlins does not stop it, because air still reaches the steel behind the batt, and all that changes is where the water forms. Foam sprayed in direct contact with the sheet removes the cold surface entirely, which is the only arrangement that actually ends it.
What is parked in it, and what it brings with it
A post-frame building on an Edson acreage typically holds a tractor, a quad, a trailer, a boat, tools and whatever else the property needs. Most of it comes in through snow and none of it is dried first. That water evaporates into a closed building with no air exchange, and it is the reason a shed can be noticeably damper inside than the yard outside it. The contents are also the reason it matters: tools, fasteners, wiring and anything with a bare steel surface all suffer.
Half the building is worth doing and half is not
The useful answer on many of these buildings is to treat part of it. A workshop end, a heated bay, or simply the roof plane over the area that holds anything worth protecting. Doing the whole shell on a building that is mostly used for parking a trailer is money spent where it does not return, and partitioning is frequently cheaper than treating the volume. Being able to say which half is worth doing is most of the value of a proper look at the building.
Pole Barn Spray Foam Insulation Edson: Common Questions
Why does batt under the roof not work? Air still reaches the steel behind it. The water just forms out of sight.
Do we have to do the whole building? Frequently not. Treating the part that holds something worth protecting is usually the better spend.
Is the weight of the foam a problem? It is a light assembly. The load conversation here is about snow, and it belongs at the start.
Size the assembly with the R-value calculator, then get a free Edson quote. More on Pole Barn Spray Foam Insulation Alberta.