Rmax Multi-Max FA-3 insulation features a rigid, closed-cell, Polyiso foam bonded to glass fiber/organic mat facers, making it compatible with virtually any roof system on the market. Specify it for use with single ply, built-up and modified bitumen membranes or metal panel roof systems. It is approved for use in new roof constructions and limited retrofit/recover roof constructions over steel, wood, non-combustible and certain types of nailable roof decks. This product can be ordered at a variety of R-values with corresponding thicknesses to meet any code requirement through single or multiple layers. Custom panel lengths are also available, and if required, a 25 psi formulation.