Products / Mule-Hide Poly ISO Insulation

Roof insulation boards of closed-cell polyisocyanurate foam laminated to non-asphaltic glass fiber reinforced felt facers, offered as Poly ISO 1 or Poly ISO 2 depending on location, in 20 and 25 psi compressive strengths. Flat boards come in 4 by 4, 4 by 8 and 4 by 12-foot sheets from 1 inch thick; tapered boards come in 4 by 4-foot sheets from 1/2 inch. They are used under ballasted, mechanically attached and fully adhered single-ply systems on new construction, tear-off and recover projects, and the product page states they are rated for use in UL Class A and FM Class 1 assemblies.