Barn spray foam insulation in Picture Butte is work on buildings that hold animals in a part of the province where animals are held in quantity. The thermal argument is the one everybody expects. The argument that actually decides how long the building lasts is chemical, and it is almost never raised in an insulation conversation.
The barn is corroding from the inside
Air in an occupied livestock building carries two things in addition to heat. It carries water, from respiration, from manure and from any wash area. And it carries ammonia, released as manure and bedding break down. Neither is a problem while it stays as vapour. Both become a problem the moment the vapour reaches a surface cold enough to condense on, because what forms there is not clean water. It is a wet film with dissolved ammonia in it, sitting directly on galvanised steel and sitting inside every screw hole in the sheet.
The outside of the cladding can look sound for years while this is happening. The sheet corrodes from the hidden face outward and the fasteners go first, because a screw hole is a cut edge with no coating left on it. The first visible sign is usually a rust streak running down the inside of the wall from a fastener line, and by then the fastener is already compromised.
Why foam is the answer to a corrosion problem
Insulation that hangs in front of steel does not stop this. A fibre batt, a vinyl-faced blanket or a board held off the surface all leave a layer of air between themselves and the cladding, and humid barn air finds that layer. The cold steel is still there, still reachable, and now it is also hidden from view.
Closed-cell foam is sprayed onto the steel and adheres to it across the whole surface. There is no gap, so there is no air at the cold face, so there is nothing for the ammonia-laden moisture to condense into. At roughly two inches the foam is also a vapour retarder in its own right, which means the water does not migrate out to the sheet in the first place. Removing the cold surface is a more durable strategy than trying to coat it.
The screws, the purlins and the places foam has to actually reach
Three details decide whether this works. The fastener line, because that is where the metal is most exposed and where the foam has to be thick enough to keep the head above the dew point. The purlins and girts, which are a thermal bridge and will condense in a line across an otherwise dry wall if they are skipped. And the wall-to-roof junction, which on most of these buildings is a stack of overlapping sheets and trim with a continuous slot of air behind it. A quote that covers the open bays and leaves those three is quoting the easy two thirds.
Where the steel is already rusting, that has to be dealt with before anything is sprayed. Foam needs a sound, dry, reasonably clean substrate to bond to, and it will not stick reliably to loose scale. Preparation is part of the job on an older barn, and anyone who does not mention it has not inspected the building.
Ventilation does not go away
Sealing a barn does not remove the need to move air through it; it makes it possible to control how much and where. The moisture and the ammonia both have to leave, and in a sealed building they leave through a fan and an inlet you chose, at a rate you set, rather than through whichever lap happens to be loosest. That is the real change. A tight barn with no ventilation plan is worse than a leaky one; a tight barn with a ventilation plan is the only version of this building that actually performs.
The crew on your job
Barn spray foam insulation Picture Butte is quoted, scheduled and sprayed by us. Our own installers are on the job, and the number you are given is the number we stand behind.
Barn Spray Foam Insulation Picture Butte: Common Questions
Our barn's steel is rusting on the inside. Is it too late? Not necessarily, but the preparation becomes part of the job. Loose scale has to come off and the substrate has to be sound before foam will bond to it.
Will sealing the barn make the ammonia worse? Only if nothing is done about ventilation. A sealed barn with a planned inlet and exhaust is drier and lower in ammonia than a leaky one, because the surfaces stop condensing.
How much does barn spray foam insulation cost in Picture Butte? Priced per board foot over the sprayed area, so area and thickness set the base. On an older barn the substrate preparation and the fastener and purlin detailing are what move it.
Best barn spray foam insulation contractor in Picture Butte? Ask what they will do at the fastener line, the purlins and the wall-to-roof junction. Those three decide whether the barn stops corroding.
Size the assembly with the R-value calculator, then get a free Picture Butte quote. More on Barn Spray Foam Insulation Alberta province-wide.