What can consumers do if they are concerned with exposure from contact with CCA-treated wood structures?
If consumers are concerned with potential exposures that may result from contact with CCA-treated wood, they may treat the structure with a sealant. Available data suggest that application of penetrating coatings to decks or other residential CCA-treated structures at least once a year can reduce exposure to arsenic. Oil or water-based stains that can penetrate wood surfaces are preferable to products such as paint. This is because paints and other film-formers can chip or flake, requiring scraping or sanding for removal which can increase a consumer’s exposure to arsenic. Consumers should consider the required preparation steps (e.g., sanding, power washing, etc.) before selecting a product to minimize potential exposure to arsenic, both for initial application and re-coating.
