Metal building spray foam insulation in Carstairs is applied directly to the inside of the steel, and most of these buildings sit on acreages and small commercial lots owned by people who are in them for a couple of hours a day rather than all of it.
A steel shell used at both ends of the day
Steel has almost no capacity to hold heat, so a metal building follows the outside air very closely and does it quickly. In a building somebody occupies all day that shows up as a running cost. In one used for two hours in the evening it shows up differently and more painfully: the space has to be brought up from wherever it has fallen every single time, and the person doing it is standing in it waiting. That is the complaint that actually gets made here, and it is governed far more by air movement through the shell than by how much insulation is on it.
Everything that gets screwed to the wall later is a hole in the layer
A shop on an acreage accumulates. Racking down one side, a bench, cabinets, a hoist, brackets for whatever needed hanging that year. Every one of those is fixed through the inside face of the wall, and once the wall is a continuous sprayed layer each fixing is a penetration through the thing doing the sealing. Individually they are trivial. Twenty of them along a wall is a row of small holes at exactly the height warm air collects. The way round it is not to avoid fixing things, it is to decide before the spray goes on where the load-bearing points will be and to put backing on the girts at those positions, so the fixings land on steel that was always going to be penetrated rather than being driven wherever a bracket happened to go.
Getting the shell warm enough to spray is part of the job here
Foam has to go onto a surface warm enough to take it, and a metal building that nobody heats routinely is not that surface for a large part of the year. On an occupied house the building is already warm and the question never arises. On an acreage shop that has been sitting at outside temperature since October it does, and the answer is heat brought in and run long enough to bring the steel itself up rather than just the air around it, which takes longer than people expect because the sheet has no capacity to store anything. That is real time and real propane and it belongs on the quote as its own line. It is also the single strongest argument for booking this work into a warmer month if the building can wait, because the same job costs less in September than it does in February.
The door goes up at the coldest moment of the day, every time
The way one of these actually gets used is that somebody arrives home in the dark, puts the overhead door up, drives in, and closes it behind them. That exchanges most of the air in the building for outside air at the coldest hour, and it happens at the start of every session rather than at some random point during it. A sealed insulated shell recovers from that within minutes because the surfaces around it are still warm. An uninsulated one starts from nothing again, which is why the building feels as though it never got anywhere. Where a Carstairs building is used as a workspace the foam also needs a thermal barrier over it, and that covering belongs in the price from the start rather than being discovered later. More on thermal barrier vs ignition barrier.
Metal Building Spray Foam Insulation Carstairs: Common Questions
Why does water drip off the roof steel inside? That is condensation on the sheet rather than a roof leak, and it is what this work stops.
Why does frost still form when there is already blanket in the building? Blanket compresses at the purlins and tears at the laps. That is where the water forms.
What gets left out of a cheap quote? The backing for anything you will hang later, and the covering if anyone works in there.
Size the assembly with the R-value calculator, then get a free Carstairs quote. More on Metal Building Spray Foam Insulation Alberta.