ExteriorFireX is pressure-impregnated fire-retardant-treated lumber and plywood that provides tested fire protection for applications directly exposed to the weather or high humidity, outdoors as well as indoors.

PyroGuard pressure-impregnated, interior fire-retardant-treated lumber and plywood for enclosed structural applications.

PyroGuard™ Interior Fire-Retardant-Treated Wood PART 1 - General Product Information A. Lumber, plywood, and Engineered Wood Products (EWP) bearing the PyroGuard™ mark has a flame spread rating of 25 or less (Class A) when tested in accordance with ASTM E84, “Standard Test Method for Surface Burning Characteristics of Building Materials.”

Pressure-impregnated, fire-retardant-treated lumber and plywood for applications directly exposed to the weather or high humidity or damp locations.

Pressure-impregnated, fire-retardant-treated lumber and plywood for applications directly exposed to the weather or high humidity or damp locations.

It specifically addresses how fire-retardant-treated wood (FRTW) can be used in building construction and examines a few case histories demonstrating the use of FRTW in lieu of noncombustible building elements.

Pressure-impregnated, fire-retardant-treated lumber and plywood for applications directly exposed to the weather or high humidity or damp locations.

Resources PyroGuard™ Specs + Tech Notes UL Documents V314 Configurations V314 Information V314 Simple Savings UL Evaluation Report NFPA 285 UL Listing EWS0045 2 Hr FRTW fire rated wall assembly: UL V314 Link to UL Information; free UL account required UL (USA) Classification with Guide, Lumber Link to UL Information; […]

This category covers the surface-burning characteristics of plywood treated by pressure impregnation to reduce combustibility, and plywood consisting of treated cores with treated or untreated face veneers that may or may not be prefinished.

PyroGuard™ fire-retardant-treated wood can only be used for interior applications involving dry conditions of use above grade and not exposed to weather, dampness or wetting.