Shipping container spray foam insulation in Okotoks covers two situations that turn up constantly around this town: the sea can sitting on an acreage as secure storage, and the container used as a site office or tool store on a build.
The sea can on an acreage
This is the common one. A container is bought as cheap, secure, lockable storage, put on a corner of the property, and filled with tools, tack, seasonal equipment and whatever else needs to be out of the weather. Then the owner opens it in spring and finds everything inside wet. The container has not leaked; the moisture was in the air inside it and it condensed on the coldest surface, which is the entire structure.
Why a steel box is the worst case for condensation
A container is corrugated steel with almost no thermal mass and no insulation anywhere. It follows the outside temperature closely and quickly, which means every mild spell puts warmer moist air inside, and every cold night turns the whole shell into a condensing surface. In chinook country that cycle repeats often, so an Okotoks sea can gets it worse than the same container would in a steadier climate.
Foam is the assembly that fits a container
There is no cavity, no framing to fill, and no flat plane to fasten a board to without creating a gap behind it. A continuous layer adhered to the inside face of the corrugation covers the ribs and the panels together, removes the condensing surface, and takes up very little of the interior. That last point matters more than people expect: a container is a fixed volume and anything that builds inward is space that cannot be used.
The site office version
Where a container is being used as an office or a lunch room on a build, the requirement moves from protecting contents to being habitable, which means the floor comes into scope as well and ventilation becomes a deliberate decision. A sealed box with people in it and no way for moisture to leave produces condensation on the windows and the walls, so the insulation and a vent are one piece of work rather than two.
Shipping Container Spray Foam Insulation Okotoks: Common Questions
Everything in our sea can is wet. Is it leaking? Almost always not. The moisture is in the air inside and condenses on the steel, which is the coldest surface in the container.
Why is it worse here than elsewhere? Chinooks. Each mild spell puts warmer moist air inside and each cold night condenses it, and around Okotoks that repeats through the winter.
Does it take up much space inside? Very little. A continuous layer adhered to the inside face covers the corrugation without building inward the way a framed and boarded approach would.
Is this a code requirement or a preference? It is a requirement. Foam plastic in an occupied Okotoks container is finished with a thermal barrier, and that is not a matter of preference.
Size the assembly with the R-value calculator, then get a free Okotoks quote. More on Shipping Container Spray Foam Insulation Alberta.