RE: I would like to build an archery backstop.Any suggestions?
I'd avoid the solid styrofoam, especially with a very fast bow. You are likely tomelt the Stfoam onto the arrow with friction. What I use is the sheet foam that you see wrapped around products. It is a sheet maybe 1/8"-3/16" thick, comes anywhere up to 4'+ wide and XXXXX long. Kind of feel like a foam rubber but has very large bubbles in it. (not bubblewrap)