CHEMCO Promotes Use Of Fire Retardant
For Wood Roofing Products
August 1, 2001
CHEMCO, the world leader in fire retardant products for cedar, is promoting the use of wood as a safe choice for roofing material across the US. A new web site for CHEMCO has recently come online, educating homeowners, contractors, and architects on the benefits of fire-retardant treated Western Red Cedar shakes and shingles.
"Through our new web site, we now have the opportunity to tell a different story; that wood, when pressure impregnated with CHEMCO's proprietary fire retardant treatment, is a safe material for your roof," said John Gibb, President, CHEMCO.
CHEMCO is one of the first companies to utilize a unique pressure treating process for Western Red Cedar shakes and shingles, and is the only company to complete the stringent 10-year Weathering Test, based on the Underwriters Laboratories' strict standards. The test is designed to determine whether treated shakes and shingles can still hold their fire-retardant qualities after being subjected to the long- term effects of natural weather conditions. CHEMCO is currently the only roofing fire-retardant treatment company to be in compliance with California Health and Safety Code and is approved by the California State Fire Marshal. It is a continuous evaluation process that enables CHEMCO fire-retardant shakes and shingles to maintain their legality, their acceptance under the codes, and their ability to provide lifelong protection for the buildings they cover.
Cedar shakes and shingles treated by CHEMCO are required to be Number 1 Grade, free of any defects. The bundled shakes and shingles are placed in a high-pressure vacuum chamber where air and moisture are withdrawn from the wood. The chamber is then flooded with fire-retardant chemical and pressurized to 130-150 PSI. The pressure is maintained anywhere from 10 minutes to several hours, depending on the wood's thickness and moisture content. Upon completion of impregnation in the vacuum chamber, the materials are placed in a dry kiln, where they are cured at temperatures up to 180F for three to seven days. At that point, the treatment process is complete and the materials are packaged and made ready for shipment and application.