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Treatment of CCA Wood

Wood rots when it is in constant contact with moisture and consequently, wood is variously treated to preserve it in moist conditions. Factory treatments have included creosote, pentachlorophenol and chromate copper arsenate (CCA).

  1. Arsenic

    • CCA is made with arsenic, a powerful toxin. The technical name for this class of chemicals is inorganic arsenicals. Inorganic arsenicals have been linked to cancer, genetic damage, birth defects and poisoning.

    Phase Out

    • In 2003, the Environmental Protection Agency (EPA) ordered the phase out of CCA lumber for residential use. CCA was the most popular treatment, and what you were likely getting when you bought pressure-treated lumber at the home improvement store.

    Warning

    • CCA retains its toxicity for many years. Skin contact, especially when handling moist wood, is a route of exposure. CCA-treated wood can be identified by the lumber stamp, if it is present, and by sight. Newer CCA lumber has a pale olive tint compared to the more-yellow, untreated lumber. Weathered CCA lumber takes on a gray-green color. Wear gloves while handling CCA lumber and wash your hands frequently.

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Carpentry
  1. Patina Wood Treatment
  2. DIY Barstool Plans
  3. Teak Wood Treatment
  4. Types of Dimensional Wood
  5. Log Cabin Wood Exterior Treatment
  6. How to Fix Warped Lumber
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  10. Oak Wood Treatment
  11. DIY Deck Treatment
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