Skip to Main Content
Protecting wood decks from biodegradation and weathering : evaluation of deck finish systemsAuthor(s): J. J. Morrell; P. F. Schneider; R. Sam Williams
Source: Forest products journal. Vol. 51, no. 11/12 (Nov./Dec. 2001).:p. 27-32.
Publication Series: Miscellaneous Publication
PDF: Download Publication (248 KB)
DescriptionMildew resistance, water repellency, and overall finish appearance were evaluated for 32 deck finishes on western redcedar (Thuja plicata D. Donn.) and Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) after 12, 21, and 39 months of outdoor exposure in western Oregon. The finishes were either solvent-borne or waterborne; were ei- ther clear, tinted, or lightly pigmented; and were, in general, formulated to penetrate the wood surface. Mildew resistance was generally good for most of the finishes through the 21-month evaluation. Water repellency was fair at the 12-month evaluation, but in almost all cases had disappeared after 21 months. Overall appearance varied considerably for the finishes. Clear finishes generally were in only fair condition after 12 months; however, several tinted and lightly pigmented finishes were in good condition after 21 months. All finishes were in poor condition after 39 months. Service lives of these finish types can be extended to the 2-year range, but additional research and development is needed to achieve a longer service life. Given the low solids content and transparent nature of these finish types, a 2- to 3-year service life should be considered excellent in a fully exposed horizontal exposure.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMorrell, J. J.; Schneider, P. F.; Williams, R. Sam. 2001. Protecting wood decks from biodegradation and weathering : evaluation of deck finish systems. Forest products journal. Vol. 51, no. 11/12 (Nov./Dec. 2001).:p. 27-32.
KeywordsPseudotsuga menziesii, Thuja plicata, Mildews, Decks, Biodegradation, Weathering, Water repellent finishes., Decay fungi, Fungus control, Pen
- Service life of finishes on smooth-planed and saw-textured western redcedar bevel siding
- Effect of surface preparation on service life of top-coats applied to weathered primer paint
- Erosion rates of wood during natural weathering. Part I, Effects of grain angle and surface texture
XML: View XML