Now everyone in homerepairlive land is confusing me. I was told by someone
that I could use polystyrene instead of fiberglass to insulate my HUGE
crawl space and it will have and R10 value opposed to the R13 value of the
fiberglass. I first asked the question what does the "R" mean then I asked
is polystyrene (styrofoam) just as good as fiberglass to help keep in
heat. Could someone simply say yes or no. Is polystyrene good, safe and
effective to use for insulating a HUGE crawl space?