latter tests address life safety d...

latter tests address life safety disturbs about the foamed polystyrene in direct-to-deck applications
For years, insulation made of polyisocyanurate -- or polyiso -- has thrived in low-slope roofing applications, in part because of touchs about the fire performance of competing insulations made of foamed polystyrene
At issue is the performance of foamed polystyrene insulation when it is applied directly to a metal canopy deck, rather than to a thermal barrier separating the insulation from the apparel
Prior to the mid-1980s, thermal barriers (usually made of gypsum)