Cedar shakes and shingles still are accepted with chromated
copper arsenate (CCA) preservative treatment because the potential
for environmental concerns is virtually nonexistent. CCA-treated
shakes and shingles continue to perform well, and pressure
preservative treatment factories offer warranties of up to 50 years
for this treatment.
CCA treatments are compatible with galvanized, copper and
stainless-steel fasteners. Because CCA-treated shakes and shingles
do form a component of treated wood assemblies, I wanted to offer
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