Shipping container spray foam insulation in Pincher Creek is a straightforward job with one local complication that has to be settled before anything is sprayed. A container is a tall flat-sided box, and a tall flat-sided box standing on open ground at the foot of the mountains is a sail.
Block it, level it and tie it down first
A container sitting on uneven ground bears on two or three of its corner castings instead of four, which means it is already twisted. Add a strong sustained push on one long side and it rocks on those bearing points, slightly but repeatedly. Everything about a sprayed interior assumes the shell is not moving: closed-cell foam is rigid, it is bonded to the steel, and where the box flexes the layer will crack along the line of the movement, usually at the corners and at the top rail. So the first part of this job is not insulation at all. It is four level bearing points on firm ground, a pad that drains, and a sensible tie-down for a container on an exposed site. That work is cheap and it determines how long the interior lasts.
Why closed-cell against the steel is the only sensible assembly
A container wall is corrugated steel, so there is no cavity, nothing flat to fix to, and no way to fit a board or a batt without framing out and losing most of the internal width. Worse, framing out and insulating inside the frame leaves an air space against the steel, and the steel is the coldest surface in the structure by a wide margin. Any moisture in that air space goes straight to it. Sprayed closed-cell foam bonded directly to the inside face removes the air space, takes the shape of the corrugations, seals every seam and penetration, and at roughly R-6 to R-7 per inch gives useful resistance in a thin layer where internal width is precious. At about two inches it is also its own vapour control, so there is no sheet to add.
A steel box sweats harder than a building does
Steel has almost no thermal mass and conducts readily, so a container tracks the outdoor temperature closely and its inside surface drops below the dew point of the air inside it very easily. Anything stored in it that carries moisture, and anything that has been brought in wet or snowy, puts water into that air. On a clear cold night the whole inner surface condenses and it runs down the walls. In this district the chinook makes it more dramatic: a hard frost on the inside skin can melt in a few hours when the warm wind arrives, and the result is water on the floor of a box full of tools or feed.
Sun on steel is the other half of the year
The same low mass that makes a container cold at night makes it very hot in the sun. A dark box in direct afternoon sun gets far hotter inside than the outdoor temperature, which matters for anything with a liquid, a battery or an adhesive in it. Insulation works in both directions and the summer benefit is often the one owners notice.
What they are used for around here
On the ranches and along the corridor, containers are the shelter you can put where there is no shelter: feed and mineral storage, tack, tools, fencing supplies, a secure store on a remote quarter, a site office or a tool crib for a contractor working on the highway or on the ridges. In each case what is wanted is dry and secure rather than warm, which is why the sealing matters more than the thickness.
Preparation, the floor and the sunlight limit
The steel gets cleaned of oil, dust and loose rust before anything goes on it, because peel is how a bond on steel fails. The original floor is a treated plywood deck and it is worth inspecting and sealing or overlaying rather than ignoring. And spray foam is not UV stable, so if any part of the work ends up on an outside surface it has to be coated. Inside a container that rarely arises, but the doors and the vent openings are the places to check.
The crew on your job
Shipping container spray foam insulation Pincher Creek gets handled by us from the walk-through onward. We quote and manage it, and our own installers apply the foam.
Shipping Container Spray Foam Insulation Pincher Creek: Common Questions
Why does the inside get wet? Steel follows the outdoor temperature closely, so the inner surface drops below the dew point of the air inside and condenses. A bonded insulation layer removes the cold surface.
Does it need to be levelled first? Yes. A container bearing on three corners twists, and on an exposed site it will rock under wind. A rigid sprayed layer cracks where the box moves.
Can it be insulated on the outside instead? It can, but the foam then needs a protective coating because it is not UV stable, and on a windy site it is also exposed to grit. Inside is usually the better answer.
How much does shipping container spray foam insulation cost in Pincher Creek? It is priced per board foot over the sprayed area at the chosen thickness, so container size and thickness set it. Blocking, levelling and any floor work are separate and usually small.
How do I choose a shipping container spray foam contractor in Pincher Creek? Ask what they want done to the ground and the steel before they arrive. Anyone who does not mention either is quoting a volume rather than a job.
Size the assembly with the R-value calculator, then get a free Pincher Creek quote. More on Shipping Container Spray Foam Insulation Alberta province-wide.