CertainTeed FlintBoard ISO NB Composite Polyisocyanurate/OSB Roof Insulation is a rigid board insulation for use with heavyweight shingles, standing seam metal, tile, slate and single ply roofing systems.
Consult membrane manufacturer for suitability and system requirements.
FlintBoard ISO NB features a closed-cell polyiso core bonded to either 7/16" or 5/8" OSB with a fiber-reinforced felt facer on the bottom side. FlintBoard ISO NB is also available bonded to plywood (CDX and fire-treated available in 5/8" or 3/4") upon request.
FlintBoard ISO NB is a recommended roof insulation in conjunction with CertainTeed Roofing Systems.