British Columbia Building Envelope Council

Specifying Preservative Treated Wood

The 2010 National Building Code of Canada now references the 2008 edition of the Canadian Standards Association standards for treated wood which requires a new approach to classifying treatments for different end uses. At the next BCBEC luncheon, presenter Paul Morris,  Group Leader – Durability and Protection for FPInnovations, will address treated wood requirements in the 2010 NBCC; other situations where treated wood may be needed; an overview of CSA O80 Series Wood Preservation (industrial preservative treatments, residential preservative treatments); understanding use categories 1 through 5A  (Table 1 in CSA O80.1); products and their use categories for specific exposures (Table 2 in CSA O80.1); preservative retention requirements for sawn products (Table 10 in CSA O80.1); preservative penetration requirements for sawn products (Table 5 in CSA O80.2); selecting the appropriate wood species for stability, strength and treatability; selecting the appropriate preservative; pre/post treatment conditioning; third-party quality assurance; appropriate and inappropriate product substitution; and on-site care and handling of treated wood to maximize durability.  The luncheon takes place Thursday, April 21, 2011, 12:00 noon to 2:00 p.m. at the Italian Cultural Centre Society, 3075 Slocan Street, Vancouver. Register at

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