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Title: Factors effecting paint performance on wood siding

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

Date: 2009

Source: 3rd International Coating Wood and Wood Composites. Charlotte, NC : National Paint and Coatings Association, 2009. [12] p.

Publication Series: Miscellaneous Publication

Description: Several different studies are compared to assess the effectiveness of commercial water repellent preservatives (WRP’s) in the late 1990’s 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 WRP’s 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 WRP’s and paint should be applied to end grain of wood in outdoor exposure. WRP’s 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 WRP’s are effective and which are not.

Keywords: Siding, building materials, service life, weathering, paint, deterioration, moisture, primers, coatings, finishes, finishing, testing, Wisconsin, Mississippi, stains, staining, color fading, adhesion, water repellents, wood siding, exposure tests, moisture content, durability, water-repellent preservatives, checking, discoloration

Publication Notes:

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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Hunt, Christopher G.; Williams, R. Sam; Knaebe, Mark; Sotos, Peter; Lacher, Steven; 2009. Factors effecting paint performance on wood siding. 3rd International Coating Wood and Wood Composites. Charlotte, NC : National Paint and Coatings Association, 2009. [12] p.

 


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