Fire-Rated Sheathing
LP FlameBlock Fire-Rated OSB Sheathing offers impressive structural strength and remarkable burn-through fire resistance, ideal in educational and residential projects. Created by applying a proprietary non-combustible, fiberglass-reinforced Pyrotite layer to LP OSB panels, LP FlameBlock Sheathing is an ICC certified (ESR-1365), structural fire-rated sheathing with a Class A Flame Spread Rating. It provides extended burn-through resistance, delivering a 15-minute thermal barrier (UBC-26-2). It’s durable on the job site, easy to work with and is Exposure-1 rated to withstand weather during normal construction delays. LP FlameBlock Sheathing is cost competitive and is available in a variety of PS2-rated thicknesses and lengths, including Struc-1. It also contains no hazardous chemicals and is backed by a 20-year transferable limited warranty.