The steel buildings in this valley are service structures rather than industrial ones: municipal and utility shops, maintenance and equipment buildings, storage for the operations that keep a tourist town running, and the working buildings at the back of commercial sites. Metal building spray foam insulation in Banff is almost always a response to the same complaint, and it is not that the building is cold. It is that the inside of the roof is wet.
Steel has no thermal mass worth speaking of
A panel is a fraction of a millimetre of metal. It reaches outdoor temperature within minutes of the air changing and it tracks every swing, which at this elevation includes a clear night that drops hard and a bright morning that drives the sunlit side up while the shaded side stays frozen. Any moisture in the building air that reaches that panel condenses on it, and because the panel is smooth and steeply profiled, the water runs and drips rather than being absorbed. People report it as a roof leak. It is the building's own air.
Where the moisture comes from
Vehicles bringing in snow that melts off them. Wet gear and wet concrete. Any washing operation. Combustion appliances. Equipment coming in warm and sweating. In a cold climate the indoor air in a working building almost always holds more moisture than the outdoor air, so the drive is continuously outward toward the cold panel, every hour the building is in use.
Why closed-cell is the only sensible material against steel
It is applied as a liquid and bonds to the panel and the purlin, so there is no gap and no gap means no surface for air to condense on. At roughly R-6 to R-7 per inch it reaches a useful value in the depth the structure allows, and at about two inches it is already a vapour barrier, so indoor moisture cannot get through to the metal. A batt or a blanket behind a liner leaves an air space against cold steel, which is precisely the condition the condensation needs, and in a building where the liner sags the water collects in the sag.
The purlins and the frame are thermal bridges
Spraying between the purlins and leaving their faces bare gives a building with cold stripes running across the roof, and condensation forms along those stripes in a neat pattern that tells you exactly what was missed. The frame members get covered too, not just the bays between them, and the foam continues down the wall and into the corners rather than stopping at a convenient line.
Preparation decides whether the foam stays on
Foam bonds to clean dry steel. It does not bond to dust, oil, or a panel with condensation already on it. On an existing building that means washing down, drying, and sometimes warming the structure before application, which is work that appears in an honest quote and is skipped in a cheap one. Sealing around the base plate, the overhead door frame and any penetration is the other part people leave out, and those are where the building is actually losing air.
We take care of the work
You are dealing with the contractor directly on metal building spray foam insulation Banff. We quote the job, we schedule it, and our own installers do the work.
Metal Building Spray Foam Insulation Banff: Common Questions
Our steel roof drips. Is it leaking? Most of the time it is condensation on the inside of the panel, not water coming through it. The test is whether it happens on cold clear nights rather than in rain.
Can we put a batt and a liner in instead? That leaves an air space against cold steel, which is the condition that causes the problem. Foam bonded to the panel removes the space.
Do the purlins need covering too? Yes. Leave them bare and you get cold stripes with condensation along every one of them.
How much does metal building spray foam insulation cost in Banff? Priced per board foot over the sprayed area, so area times depth. Washing and drying the steel beforehand is a real line item on an existing building.
How do I get a metal building spray foam insulation quote in Banff? Tell us the building's use, whether vehicles come inside, and whether you are seeing drips. That tells us the moisture load we are designing against.
Size the assembly with the R-value calculator, then get a free Banff quote. More on Metal Building Spray Foam Insulation Alberta province-wide.