LP® FlameBlock® Fire-Rated OSB Sheathing is a code-compliant oriented strand board (OSB) panel with a fire-resistant Pyrotite® treatment covering one or both sides. The Pyrotite treatment consists of a layer of fiberglass-reinforced magnesium oxide cement tightly bonded to the OSB surface. In addition to providing burnthrough resistance and a Class A Flame Spread rating, this layer reinforces the OSB substrate, resulting in full standard load/span ratings and shear design values for each thickness category. LP FlameBlock panels install with standard tools, methods and fasteners, and are highly resistant to cracking or damage from impact.

Features

• Applications evaluated by ICC-ES for fire-rated sheathing that combines flame-spread and burn-through resistance to meet fire codes.
• A building solution that provides strength, savings and easy installation – at an affordable price.
• Combined flame-spread and burn-through resistance bolster a home’s fire resistance capabilities, improving the homeowner’s peace of mind.
• Structural design values are not limited, providing more flexibility in designing wall openings, frames and bracing.