John Mansville

Johns Manville

 Johns Manville (JM) has announced ENRGY 3.E, the next generation of its time-tested polyisocyanurate (polyiso) product line. This new product features the current polyiso performance attributes that customers have grown to depend on with the existing ENRGY 3, with one key difference: ENRGY 3.E is inherently fire resistant and meets all current fire tests and codes without added halogenated flame retardants. JM researchers have incorporated a reactive polymer modifier that both improves the cell structure and properties of the foam as well as achieves the necessary fire resistance to meet UL Class A fire ratings in low-slope roofing assemblies. JM will continue to offer its current ENRGY 3 polyiso product line for the majority of roofing applications. Like most polyiso products in the market, ENRGY 3 contains TCPP, a halogenated flame retardant added to achieve additional fire ratings. Both ENRGY 3 and ENRGY 3.E have comparable fire, mechanical and thermal performance characteristics and the highest R-value per inch of any commonly used roofing insulation. For more information, visit