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Information about CCA-treated cedar

I read with interest the article "Treated wood and roof assemblies," April issue, page 64. Although the information was accurate and informative regarding different treatment chemicals and fastener issues, details regarding treated cedar shakes were not provided.

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 this information...

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