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ASTM C 1289 Polyiso Insulations Classifications

Type I		Type II				Type III	Type IV	Type V	Type VI
Aluminum foil facers both sides						Perlite one side	Fiberboard one side	OSB one side	Perlite both sides
Energy Shield, Supreme		ACFoam II			Rboard, ACFoam III	Comp-osite		Nail Base, Vented-R
Class 1 Non- reinforced foam core	Class 2 Glass fiber reinforced foam core	Class 1 Fibrous felt or glass fiber mat both sides			Class 2 Polymer bonded glass, fiber mat both sides	Fibrous felt or glass fiber mat on other side	Fibrous felt or glass fiber mat on other side	Fibrous felt or glass fiber mat on other side
		Grade 1	Grade 2	Grade 3
		16 psi	20 psi	25 psi
*Note:* 1 - Facers: Felts may contain organic fibers, inorganic fibers, or mixtures of organic and inorganic fibers and may be suitably bonded in one of several alternative ways using organic binders or conventional asphalt saturation to produce suitable membrance facers. Glass fiber mats can be used coated or uncoated, or asphalt coated or othewise polymer bonded to also produce suitable membrane facers.