Exterior-Grade Fire-Retardant Wood

SaferWood with Thermex-FR is solid-sawn lumber or plywood that has been pressure-treated with Chemco’s fire-retardant chemicals to create ignition-resistant, fire-retardant wood (FRTW) with a Flame Spread Index less than 25 and a Smoke Development Index less than 45 on listed species (see ICC-Evaluation Service Report 1159). According to the manufacturer, SaferWood’s use is compliant with codes in International Wildland-Urban Interface (WUI) zones in applications such as siding, deck, railing, and exterior plywood sheathing. It is also approved for interiors. saferwood.com