$62.99 Shop Rmax Polyisocyanurate Foam Board Insulation (Common: 1-in x 4-ft x 8-ft; Actual: 1-in x 4 
1/2 in. 4x8 Foil Insulation Board R3.3 - Builders Discount Center
Sheathing Polyiso 4X8 1/2 R-Max 2-Sided ***Has Foil On Both Sides*** | MG Building Materials 
