Skip to Main Content
Non-destructive Analysis Reveals Effect of Installation Details on Plywood Siding PerformanceAuthor(s): Christopher G. Hunt; Gregory T. Schueneman; Steven Lacher; Xiping Wang; R. Sam Williams
Source: USDA Forest Service, Forest Products Laboratory, General Technical Report, FPL-GTR-239, 2015; pp. 314-320.
Publication Series: General Technical Report (GTR)
Station: Forest Products Laboratory
PDF: View PDF (306.67 KB)
DescriptionThis study evaluated the influence of a variety of construction techniques on the performance of plywood siding and the applied paint, using both ultrasound and conventional visual inspection techniques. The impact of bottom edge contact, flashing vs. caulking board ends, priming the bottom edge, location (Wisconsin vs. Mississippi) and a gap behind the siding to facilitate drainage were tested. Test fences were constructed to provide outdoor exposure of 2 replicates of each permutation using full factorial design. Yellow poplar (Liriodendron tulipifera), a decay prone wood species was used for the plywood to accelerate the results. After four years of outdoor exposure, mushrooms were observed on the surface of some boards and all were removed for lab evaluation. Extensive water staining was seen on the backs of the boards caused by water travelling upward from the bottom edge. Sound velocities were measured to determine the degree of decay. Herein we will present an analysis of the relative merits of ultrasound vs. visual inspection. We also analyze factors impacting performance, including the poor performance obtained when the bottom of a piece of wood is in contact with another surface, and the unusually poor performance of the gap behind siding. The study will conclude with recommendations for construction practices.
- 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.
CitationHunt, Christopher G.; Schueneman, Gregory T.; Lacher, Steven; Wang, Xiping; Williams, R. Sam. 2015. Non-destructive Analysis Reveals Effect of Installation Details on Plywood Siding Performance. USDA Forest Service, Forest Products Laboratory, General Technical Report, FPL-GTR-239, 2015; pp. 314-320.
KeywordsInternational Nondestructive Testing and Evaluation of Wood Symposium, nondestructive testing, nondestructive evaluation, wood, wood products
- Durability of yellow-poplar and sweetgum and service life of finishes after long-term exposure
- Board-Foot and Diameter Growth of Yellow-Poplar After Thinning
- Insect enemies of yellow-poplar
XML: View XML