Steel building insulation in Ontario (Canada)

[homesteader13]

Another advantage to the foam is it actually adds structural rigidity as well.

 

[ovrszd]

Another advantage to the foam is it actually adds structural rigidity as well.

Yep. In excess.

 

[mikester]

Another advantage.

I've heard of builders wrapping the structure before they add the metal siding. Then spray foam inside. This allows the removal of a piece of metal siding if ever needed.

Easy removal - like a wind storm? No thanks, I want all the flimsy sheet metal glued and bonded by the foam. The last thing I want is a space for water to migrate, or praying the screw heads dont pop off leaving gravity to hold the sheet metal panels in place.

 

[ovrszd]

Easy removal - like a wind storm? No thanks, I want all the flimsy sheet metal glued and bonded by the foam. The last thing I want is a space for water to migrate, or praying the screw heads dont pop off leaving gravity to hold the sheet metal panels in place.

Potential for several reasons. Any that might damage a sheet of tin requiring it to be replaced. All metal buildings have the potential for water to enter if the metal isn't properly installed. I've never heard of screw heads popping off.

 

[CADplans]

you can get spray foam insulation sprayed in (parts and labor) for right about $1.00 per square foot per inch of thickness.
IE, 500 sq feet 1 inch thick would run $500.00
And 500 sq feet 6 inches thick would run $6000.00

Hmmmmmmmmm,,,,,,,,

My calculator says 6X $500 = $3,000,,, instead of $6,000,,, :thumbsup:

 

[homesteader13]

Hmmmmmmmmm,,,,,,,,

My calculator says 6X $500 = $3,000,,, instead of $6,000,,,

You are correct, I must have fat fingered it, I wonder if I can go back and edit that post?

 

[homesteader13]

Not sure about Canada, but in most of the US, you can get spray foam insulation sprayed in (parts and labor) for right about $1.00 per square foot per inch of thickness.
IE, 500 sq feet 1 inch thick would run $500.00
And 500 sq feet 6 inches thick would run $3000.00
R value for foam is way higher than the equivalent of same thickness of fiberglass batts.
Since my shop walls in the Northern Rockies are 12 inches thick I went with fiberglass on the walls and 2 inches of spray foam on the roof and peaks.
This also acts as a vapor barrier and controls moister and condensation.

 

[ovrszd]

Not arguing at all.

Actually R value for fiberglass is higher than foam once you go past a couple inches.

Again, the building "must" breathe. So you either need air transfer thru the walls or ceiling, or you need a powered system to control moisture and condensation.

It's a vicious circle.

 

[homesteader13]

Not arguing at all.

Actually R value for fiberglass is higher than foam once you go past a couple inches.

Again, the building "must" breathe. So you either need air transfer thru the walls or ceiling, or you need a powered system to control moisture and condensation.

It's a vicious circle.

Yes ventilation is definatley important, perfect example is in RVs because they are so airtight that they will actually have humidity issues in the WINTER to the point that they can get condensation on the inside walls.
This is due to cold outside and heat inside (generally in the form of a propane furnace, which creates its own humidity as well).

I am also putting in vents and fans in the wall peak on each end of the building. They can be opened and closed as needed depending on weather, temp, etc.

And once you get past 4 inches thick on high density spray foam, the cost versus R value gain isnt worth the cost, thats why I went with 12" fiberglass batts in the walls because I wanted them full before the interior walls went on and I still want to have some money left to retire!
I might not have been clear in my original post, the foam on the ceiling is dual purpose, not only insulation, but as a vapor barrier IE in the winter with a foot or 3 of snow on the roof and the wood stove going, don't have to worry about it 'raining' on me from the ceiling.
Similar to an ice cold glass of your favorite beverage on a hot humid summer day sweating.....

 

[ottawarob]

I ended up going with the silvercoat insulation as recommended by the building provider. I cannot possibly recommend other small time builders go with this insulation method, it is so incredibly picky to get the connection details correct. A spray foam quote I got was about $1.5k or $2k more and it would have been well worth it. I wish I'd never built a steel building, everything is a hassle compared to building with wood. :/