So I know I keep posting these grow box threads and it's probably annoying some people haha, but I just want to make sure this material will work before I go buy/build it! It's easy, cheap, and light weight! Please tell me your thoughts concerns! It's available at Home Depot. Would there be any problems using insulated material? Here's the material: http://insulation.owenscorning.com/homeowners/insulation-products/foamular-150.aspx
to thin? How thick should it be? It's 1-2 inches thick. What If I built the frame out of 2x4 then used this for walls?