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Madison, WI 53726-2398
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Title: Factors effecting paint performance on wood siding

Source: In: Third International Coating Wood and Wood Composites Conference: durable and sustainable--today and beyond. Proceedings, Sept. 22-23, 2009, Charlotte, NC. Washington, D.C. : National Paint & Coatings Assocation, 2009. 1 vol.

Author(s)Hunt, Christopher G.; Williams, R. Sam; Knaebe, Mark; Sotos, Peter; Lacher, Steven

Publication Year: 2009  View PDF »

Category: Conference Proceedings

Abstract: Several different studies are compared to assess the effectiveness of commercial water repellent preservatives (WRPs) in the late 1990s on vertical and horizontal siding. Besides WRP, variables included wood species, exposure location (Wisconsin or Mississippi), and solid color stain vs. primer + paint. Data on substrate checking and paint flaking are presented. Painting end grain of vertical siding was universally helpful. Appropriate WRPs on end grain universally improved performance, even when end grain was primed and painted. WRP applied to entire boards had mixed results. Any system with a primer coat significantly outperformed solid color stain applied directly to the wood. These data suggest that appropriate WRPs and paint should be applied to end grain of wood in outdoor exposure. WRPs can improve or harm performance on flat surfaces, however. Some products sold with the claims of being water-repellent preservative provided no positive benefit, even on end grain drip edge. The general public has no effective way to determine which WRPs are effective and which are not.

Keywords: Water repellent, preservative. weathering,stain, end grain, wood

File size: 291 kb(s)

Date posted: 10/06/2010
Current FPL Scientist associated with this product
Hunt, Christopher G.
Research Chemist

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