PorterSIPs structural insulated panels, which feature a layer of expanded polystyrene between sheets of oriented strand board (OSB), achieve insulation values of up to R-52, and are available in thicknesses up to 11-3/8". Type A panels have a 7/16" OSB skin on both faces. Type C panels have face sheathing that is equivalent to or exceeds the strength specification of a 7/16"-rated structural sheathing, and have Roseburg reverse board and batten fir plywood on the interior surface. ¢ portersips.com

PorterSIPsstructural insulated panels, which feature a layer of expanded polystyrene between sheets of oriented strand board (OSB), achieve insulation values of up to R-52 and are available in thicknesses up to 11-3/8". Type A panels have a 7/16" OSB skin on both faces. Type C panels have face sheathing that is equivalent to or exceeds the strength specification of a 7/16"-rated structural sheathing, and have Roseburg reverse board and batten fir plywood on the interior surface. • portersips.com