Any problems with this method of insulation for my pole barn ceiling?

[moneyisflying]

For the walls of my not yet built pole barn, I bought several 4x8 sheets of the thick pink insulation. The plan was to double it up and secure it in place with spray foam (from a can). There was a great youtube video on this that someone showed me that gave me the idea.

The plan was to spray foam the ceiling, but the cost is looking very steep even for a DIY kit to cover everything. So, what about just buying more sheet insulation and installing it on the ceiling? I could put boards across them to secure them in place and still seal around it with can spray foam like the walls. Everything should be a solid moisture barrier also.

Just wanted to check and see if anyone saw a reason that this might be a bad idea.

 

[CNGsaves]

Need more information . . . . . you talking "ceiling" to be horizontal only and keep the attic open with ventilation up there??

Or will you have vaulted "ceiling" . . .thus totally open up to roof of building??

 

[bcvickers]

Also, keep in mind that you might want to (or may be required to by code) cover it with a flame resistant barrier as the smoke from foam burning will kill you.

 

[moneyisflying]

Need more information . . . . . you talking "ceiling" to be horizontal only and keep the attic open with ventilation up there??

Or will you have vaulted "ceiling" . . .thus totally open up to roof of building??

If I took pictures, all you would see is a flatly excavated spot in my yard where it's gonna go (lol). It's not built yet.

The rafters will have sheet metal on top of them. I'm talking about just installing the insulation in between the rafters. I'm not going to have any other attic space or anything. Just the ground to the angled roof.

Also, keep in mind that you might want to (or may be required to by code) cover it with a flame resistant barrier as the smoke from foam burning will kill you.

Nope. No code required (I checked on this months ago).