Post-frame building is the standard way to get a large span up quickly and cheaply on a county parcel, and the acreages and farms around Devon are full of the results: storage buildings, riding arenas, equipment sheds and the big multi-purpose building that does a bit of everything. Pole barn spray foam insulation in Devon has to work with a structure that is genuinely different from stud framing, not just a cheaper version of it.
Girts run the wrong way for insulation
A stud wall gives you a flat plane of vertical members at regular spacing with a cavity between them, which is what every conventional insulation product was designed for. Post-frame gives you heavy posts at wide spacing with horizontal girts between them, and the cladding screwed to the girts. There is no uniform cavity, the spacing between posts is far wider than any batt, and the girts run across the direction anything would need to be fitted in.
The practical consequence is that the usual products have nothing to sit in. What works is a layer applied to the inside face of the cladding and over the girts — a continuous skin rather than a fill — and that is what sprayed foam does.
The posts are in the ground
Post-frame carries load on columns set into or onto the ground rather than on a continuous foundation, which means the bottom of the wall is a different detail from a conventional building. There is usually a splash board or a concrete curb at grade, the joint at the bottom of the cladding is rarely sealed, and that line is where cold air enters and where the wall most often shows damage. Carrying the foam down to meet that detail properly matters more than another inch anywhere above it.
Condensation on the underside of the roof steel
The characteristic post-frame failure around here is water dripping off the underside of the roof panel. Steel roofing over purlins, with the building's interior moisture rising to meet a panel sitting at outdoor temperature, condenses on contact. In a storage building that drips onto hay, equipment or anything else below. People call it a leak and it is not.
Closed-cell at roughly R-6 to R-7 per inch bonds directly to the panel and the purlins, is its own vapour barrier at about two inches, and leaves no gap and no path for air to reach the steel. Nothing laid between purlins achieves that, because the purlins themselves are the bridge.
The vapour barrier laid under the roofing at erection
Many of these buildings were built with a thin sheet laid over the purlins before the roofing went on. It works while it is intact, and over years it tears, sags and collects water in the sag. Once that has happened, the practical fix is a continuous adhered layer from inside rather than any attempt to repair a sheet trapped against the steel.
Doors, and the open end
A pole barn usually has a very large door or an open bay at one end. There is no point insulating a shell with a permanent opening in it unless that opening is dealt with — either closed and sealed, or accepted and the building treated as unheated storage where the only objective is keeping condensation off the contents. Both are legitimate; they are just different jobs with different prices.
One company, start to finish
We do pole barn spray foam insulation Devon ourselves. We scope and quote it, we book it, and our own installers spray it -- one company, one point of contact.
Pole Barn Spray Foam Insulation Devon: Common Questions
Why does my post-frame roof drip? Interior moisture condensing on steel at outdoor temperature. It is condensation, not a leak, and a continuous adhered layer on the panel is what stops it.
Can we use batts between the girts? Not usefully. The spacing is wrong, there is no proper cavity, and the girts and posts bridge straight through to the cladding.
What about the bottom of the wall? That joint at grade is a major air entry and is routinely left unsealed. The foam gets carried down to meet it.
How much does pole barn spray foam insulation cost in Devon? Priced per board foot sprayed, so wall and roof area and thickness drive the quantity. Clearing equipment out and travel to a county parcel are the other real costs.
How do I choose a pole barn spray foam contractor in Devon? Ask whether they are spraying over the girts and purlins or only between them. Only the continuous version solves the dripping.
Size the shell with the R-value calculator, then get a free Devon quote. More on Pole Barn Spray Foam Insulation Alberta.