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