Home > Shop > Drywall & Insulation > Insulation & Vapour Barrier > Rigid Foam > 2x8x3" STYROFOAM SM SHIPLAP (R15) 2x8x3" STYROFOAM SM SHIPLAP (R15) Item #: 05069590 Mfr #: 3SMT4 $62.16 each Checking Inventory Add to Cart Overview: TYPE 4 - 30PSI