Fire Retardant Treated Timber|Timbers Lumber Wood Plywood Fire retardant treated timber and timbers, lumber, plywood are vacumm pressure impregnated with Flame Safe fire retardant to comply with the ASTM E84 standard and shall have a flame spread of 25 or less. Accredited independent third party testing Fireretardanttreatedtimber.info~Site InfoWhoisTrace RouteRBL Check