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.

 

[sierracharlie338]

Mine has been good, it’s been around 15years. In my garage it’s exposed as the interior is not sheeted, I generally do not heat it either. I have not seen any change in it. In my shop it is covered, but looking in the attic, there hasn’t been any change.

Impressive and thanks for the info!

 

[Rich M]

Insulated bld before trimming. Still waiting for him to finish.

 

[bowhuntercoop]

My 40x60 has the roll on bubble sheets. I never turn the heat or air on. Stays a good 15-20 degrees cooler in the summer and about the same in the winter. I’m in SC.

I built a 20x20 metal pool house last summer. I’m going the 4x8 sheets of 3/4 radiant barrier/ insulation on the roof only. I just wanna knock the inside temp down a few degrees during the summer since it’s all metal and gets a bit to warm during the bday party’s. Doors are always open so makes no sense to fully insulate it and run the ac.

For a shop or garage spray foam is overkill for my applications and it’s a nightmare for future add ons or additions.

If I lived where it was cold and actually need insulation idk if there is anything better that spray, I would just make sure all my electrical, air compressor lines, access panels, etc was 100 percent correct before spraying.