cutting foam core?

I am loking for methods to slice full blocks of foam Core (48x88.5x17") to thickness and am considering building a hot wire cutter. However I seem to remember that either PVC Foams or Urethane foam are not supposed to be hot wire cut. Does anyone here know which one it is?

Use a very wide horizontal band saw.

Do not hotwire… they emit nasty toxic fumes…

If I recall only [FONT=Tahoma]polystyrene [/FONT]foam is safe to hotwire.

Dang, that’s good info there. I didn’t know about the fumes… never tried it and never will now.