AVP's insulated square roof curbs use Johns Manville Foil-Faced Polyisocyanurate board insulation to control condensation and resist moisture absorption — outperforming traditional fiberglass insulation that traps moisture and promotes mold growth. These are 18" high with sizes to fit vents from 12" to 48". Compatible with EPDM, PVC, and TPO roofing systems and removable for easy attic access.… Read More
