Shipping container spray foam insulation in Edson is closed cell foam sprayed directly onto the inside of the steel, with nothing allowed behind it. The corrugations are why nothing rigid fits, and in this town the reason anybody calls is water rather than temperature.
Why the inside is wetter than the yard it stands in
A sea can is a sealed steel box. Whatever moisture goes in stays in, and in Edson a great deal goes in: wet gear, snow on boots and equipment, damp material stacked in a hurry. There is no ventilation and no sunlight reaching it, so nothing ever leaves. The result is a container that is reliably damper inside than the open yard around it, which is the opposite of what an owner expects from a locked steel box.
A steel box sitting in the shade all year
Most of these are parked where there is room rather than where there is sun, which on a treed Edson property means permanent shade. That removes the one thing that used to help, which is a bright day warming the box enough to drive moisture out through an open door. Without it the container simply holds its condition from October to April, and everything inside sits in that condition the whole time.
Snow on the roof of the can, and what it does
Snow accumulates on top and stays, because nobody clears a container roof. It keeps the steel at a steady low temperature and it melts slowly at the edges, running down the corrugations and finding any imperfection in the paint. Surface rust on the roof and the upper corners is the usual result, and it is worth inspecting before anything is sprayed, because foam goes onto sound, dry steel or it does not go on at all.
Doors that freeze shut
The practical complaint that gets these treated is a door that will not open. Moisture inside condenses on the door seals and the locking gear, freezes, and the container becomes unopenable on exactly the morning somebody needs what is in it. Sealing the interior properly reduces the moisture that causes it, and the seals and the gear get looked at in the same visit because there is no point insulating a box nobody can get into.
Shipping Container Spray Foam Insulation Edson: The Covering Requirement
Where the container is used as an office, a lunch room or a shop, the foam does not stay exposed. A container in Edson that people spend time in needs a thermal barrier over the foam, usually a sprayed coating or a light lining, and it is priced with the job. A box used only for storage is quoted differently and that difference gets stated.
Shipping Container Spray Foam Insulation Edson: Common Questions
Why is it wetter inside than outside? Everything goes in wet and nothing ever leaves. There is no ventilation and no sun on it.
Why do the container doors freeze shut every winter? That is condensation on the seals and gear. Reducing the moisture inside is what stops it.
Is surface rust a problem before spraying? Yes. The steel has to be sound and dry, and that gets checked first.
Size the assembly with the R-value calculator, then get a free Edson quote. More on Shipping Container Spray Foam Insulation Alberta.