Home > Shop > Drywall & Insulation > Insulation & Vapour Barrier > Rigid Foam > 2x8x1" STYROFOAM SM BUTT EDGE (R5) 2x8x1" STYROFOAM SM BUTT EDGE (R5) Item #: 05069330 Mfr #: 1SMT4 $20.72 each Checking Inventory Add to Cart Overview: TYPE 4 - 30PSI