Hey guys, I will have my 40x60x12 pole barn done in a week or 2 and had a quick question about insulation. So far, i have insulated doors and windows, metal on the ceiling with blown in on top and double bubble wrapped all around. For the walls I'm not sure what to do. I'm trying to keep it as cost effective as possible because this thing is getting expensive! And I'm not going to heat it all the time and I don't spend every day out there. Right now its just with a big salamander. Possibly upgrade to a pellet stove eventually. I can pick up white 1.5 inch rigid foam insulation for relatively cheap and its 4x8 sheets so 3 sheets fit perfect between the posts. Quick and easy install and its white so i would assume that will help with lighting as well. Do you guys see an issue with this or do i need to run it between the wall purlins so that its flush with the double bubble under the metal? Thanks for any advice you can give!