Insulating a metal building

[Weldor]

Humidity in your area? seems like you would want to spray when it's pretty dry or risk trapping moisture on that steel. Possible rust issues down the road? Be worth finding out.

 

[Gadjet]

Humidity in your area? seems like you would want to spray when it's pretty dry or risk trapping moisture on that steel. Possible rust issues down the road? Be worth finding out.

I'm in western Colorado. Pretty dry climate so moisture shouldn't be a concern.

 

[Frozenlead]

It sounds like spray foam is the way to go. One problem that I have with foam is the finished look on the inner roof. I'll eventually be sheeting the walls with plywood or OSB. So the walls will be covered, but I was going to leave the trusses open. Just from some photos I've seen on the web, the spray foam looks pretty rough when left exposed.

Here’s my walls. The ceiling is sheeted with the foam sprayed in the attic onto the flat sheeting, not the roof pitch.