All products can be fire treated prior to installation. Fire retardant classes are categorized as either ‘B’ or ‘C’. ‘B’ being the most resistant to moderate fire for a longer period of time and ‘C’ being resistant to light fires. A Class ‘A’ roof system can be obtained by using Class ‘B’ product with an approved fiberglass cap underlay.
The fire retardant process consists of drying the product, to remove moisture, in Dry Kilns then using vacuum chambers to pressure impregnate it with the fire retardant of choice, this ensures that the chemical penetrates all the way through to the inner cells of the wood. Once this is completed the products are re-dried in Dry Kilns locking in the chemical retardant providing a completely fire retarded product protected from the elements such as wind and rain. This type of fire retardant treating is far superior to topical treatments applied after installation, which in certain cases can be worn away or washed off.