Fire retardant cedat roofing passes time and weather tests

materials graded as No. I by the Bureau are treated. The treating process seals bundles of newly made cedar shakes and shingles inside a high pressure chamber. After a vacuum is created to draw out air and moisture from the cells, pressure up to 150 lbs. per square inch forces the fire retardant chemical into the wood cells. The shakes and shingles are then thermally cured at temperatures up to 200 degrees Fahrenheit to lock the fire retardant into the wood fibers through polymerization.

Fire retardant shakes and shingles sell for about 25Vo more than asphalt roofing products and are competitive withmost of the tile and cement roofing products on the market. They offer a consumer the advantage of a fire retardant roof with a traditional appearance. Cedar shingles and shakes have additional benefits of being light in weight and able to withstand any necessary roof walking.

Members of the Cedar Shake & Shingle Bureau also produce cedar

Story at a Glance

Fire retardant cedar shakes & shingles update.. facts to close a sale. product competitive with other Class C and B roofing products shakes and shingles with a 30 year warranty against fungal decay. Identified by a Certi-Last label, these products have been pressure treated with a chemical which resists fungal decay. They are recommended for roofs exposed to high heat and humidity.

Certi-Guard or Certi-Last products can be ordered from Bureau member producers to meet the needs of customers. Orders usually can be filled in a weekor less, a spokesman said. Wholesalers who stock cedar shakes and shingles may send them to a local pressure treater certified to apply CertiLast or Certi-Guard treatments.