Products / Petersen PAC-CLAD PAC-Shield CV

Vented nailbase roof insulation panel for steep-slope roofs, built from a 4 x 8 foot closed-cell polyisocyanurate board, solid wood spacers forming a standard 1-inch air space (1.5 and 2-inch spacers available), and a top layer of 7/16 or 5/8 inch OSB or 5/8 or 3/4 inch plywood. Overall thicknesses run from 2.5 to 5 inches, the foam is ASTM C1289 Type II, Class 1, Grade 2 (20 psi), and the panel is for slopes of 3:12 or greater under standing seam metal, shingle, slate and tile roofs. The data sheet lists FM 4450 and FM 4470, UL 790, UL 1256 and UL 263 classifications and Florida Product Approval FL 46425.