Quote Originally Posted by Irving View Post
Apparently R-value multiplies as you stack it together, but you are supposed to use an R-value of 5.6 per every 1" of poly iso. I'm looking at getting some of these tomorrow. I've already been there and they have a LOT of them in I think 3".

https://www.repurposedmaterialsinc.c...so-insulation/
You have to buy the whole pallet Stu if you want individuals go to extras off 58th And i25