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Article

Reconsidering Rot-Resistant Framing Material

When copper chromated arsenate (CCA) was eased off the market at the end of 2003 due to fears about its toxicity, builders needed to find new sources for rot-resistant structural lumber. As contributing editor, Scott Gibson, has discovered, the industry has responded by developing three new types of rot-resistant framing materials. The new materials include lumber treated with alkaline copper quaternary (ACQ) or copper azole (CA); wood treated with borate, a naturally occuring mineral salt; or fiberglass-reinforced plastic lumber (FRPL), made from recycled plastics. This article includes a sidebar about new compounds and organic treatments in development.

Reconsidering-Rot-Resistant-Framing-Material_FHB186.pdf

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