Fire Retardant Treated Wood (FRTW) is a specially processed lumber that has been chemically treated to significantly reduce its flammability and slow the spread of flames and smoke in the event of a fire. It is widely used in construction projects where building codes or safety concerns require added fire protection without sacrificing the natural benefits of wood.

How FRTW Is Made

FRTW is produced by impregnating kiln-dried wood with fire-retardant chemicals under high pressure in a vacuum chamber. These chemicals alter the wood's combustion properties, enabling it to resist ignition, reduce flame spread, and minimize smoke generation. After treatment, the wood is often re-dried to ensure it retains proper dimensional stability for construction use.

Key Features

• Reduced Flame Spread Index: FRTW typically meets or exceeds ASTM E84 Class A flame spread ratings.

• Code Compliance: Meets standards set by the International Building Code (IBC) and National Fire Protection Association (NFPA).

• Structural Integrity: Maintains the load-bearing and strength properties of untreated wood when properly manufactured.

• Versatility: Suitable for interior and some exterior applications, including framing, sheathing, and roof assemblies.