Machine shed spray foam insulation in Calgary is about protecting what is parked inside rather than about making the building comfortable. On acreages and farms around the city these are large, usually unheated steel buildings holding equipment worth considerably more than the structure over it.
The building is a shelter that rains on its own contents
An uninsulated steel roof over a machine shed is the coldest surface for a long way. Whatever moisture is in the air, from the ground, from equipment brought in wet, or from a warm afternoon followed by a clear night, collects on that underside and falls. Owners describe it as a leaking roof and the roof is usually sound. What is landing on the machinery came out of the air inside the building.
Why parking outside is sometimes better than parking under this
It is worth saying plainly: a machine under a dripping steel roof can be worse off than the same machine outside, because outside it dries between rains and inside it stays wet. That is the real comparison to make when weighing this work, rather than comparing against a heated building nobody was going to build.
Unheated does not mean untreatable
The most common objection is that there is no point insulating a building that is never heated. For condensation that reasoning does not hold, because the mechanism is a cold surface rather than a temperature difference somebody is paying for. Removing the cold surface removes the drips, and on an unheated shed that is usually the entire correct scope: the roof deck, and often nothing else.
What to look at before a Calgary quote
How the shed is used through the year, whether anything is brought in wet, whether there is a concrete floor or bare ground underneath, and what the current cladding and fasteners are like all matter. A shed with bare ground under it is putting moisture into the air continuously, and that is worth knowing before the roof is treated. A gravel or dirt floor is a continuous source, and covering it changes what the roof has to cope with. It is also the cheapest part of the whole job and the one most often skipped.
Machine Shed Spray Foam Insulation Calgary: Common Questions
My shed is never heated. Is there any point? Usually yes, and for condensation rather than warmth. The steel is the coldest surface in the building and that is where the water is forming.
Does the whole building need doing? Frequently not. On an unheated Calgary machine shed the roof deck alone is often the correct scope, because that is where the moisture collects and falls from.
Water drips even when it has not rained. Why? Because it is condensation rather than rain. Warm moist air reaches cold steel overhead and gives up its water there.
Size the deck with the R-value calculator, then get a free Calgary quote. More on Machine Shed Spray Foam Insulation Alberta.