Wood Shake Roofs

1. The full-cell pressure treating process begins with Number 1 Grade cedar shakes or shingles. The cells of this high grade wood are ideal for chemical bonding.

2. Before the wood is treated it is dried to achieve moisture content levels that will allow maximum penetration of fire retardants.

3. Once inside the pressure autoclave tube, the computer monitored process begins by drawing a light vacuum in the tube which prepares the wood cells for treating. The fire retardants then flood the treating tube. At pressure of 150 pounds per square ", the fire retardants penetrate the inner cells of the wood. Computers monitor the level of treatment assuring that the wood captures predetermined levels of fire retardants.

4. After pressure treatment, the shakes and shingles are cured in a computer monitored environment. This setup removes the moisture content used in treatment. The fire retardants polymerize, locking into the cells of the wood. This final step makes the treatment permanent.