Home > Shop > Drywall & Insulation > Insulation & Vapour Barrier > Rigid Foam > 4x8x1-1/2" CLADMATE CM20 SHIPLAP (R7.5) 4x8x1-1/2" CLADMATE CM20 SHIPLAP (R7.5) Item #: 05059440 Mfr #: 112CM48T3 $56.88 each Checking Inventory Add to Cart Overview: TYPE 3 - 20PSI