Silverboard SB35 35 PSI Non-Perforated Rigid Insulation - 4" x 4' x 8' R20

SB 35 4" x 48" x 96" w/laminate 35 PSI at 10% deflection R20 NON PERF

This rigid insulation sheet delivers exceptional thermal performance with its high-density expanded polystyrene core and dual-sided reflective foil facing. The silver finish combines practicality with enhanced energy efficiency, while the BASF reflective lamination on both sides achieves a superior R value per unit compared to conventional insulation. Designed for exterior sheathing, this foil-faced solution withstands demanding job site conditions. Perfect for builders and contractors seeking maximum energy savings, this insulation sheet offers reliable performance and durability. Its ventilated surface film ensures resilience, making it ideal for exterior wall applications where protection and efficiency matter.