Long-Term Performance of Preservative-Treated Shingles of Western Wood Species

The performance of western hemlock, sugar pine, and western larch as alternatives to western redcedar (WRC) for roof shingles was investigated on outdoor roof racks with and without an initial brush or dip treatment with either pentachlorophenol (penta) or chromated copper arsenate (CCA). Untreated...

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Bibliographic Details
Published in:Forest products journal 2017-11, Vol.67 -8 (7), p.471-473
Main Authors: Morrell, Jeffrey J, Miller, Donald J, Sichamba, Kennedy
Format: Article
Language:English
Subjects:
Analysis
Arsenates
Building materials durability
Chromated copper arsenate
Chromates
Copper arsenate
Exposure
Forest products
Forest products industry
Laboratories
Pentachlorophenol
Preservatives
Properties
Roofing
Wood
Wood preservatives
Wood shingles
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Summary:The performance of western hemlock, sugar pine, and western larch as alternatives to western redcedar (WRC) for roof shingles was investigated on outdoor roof racks with and without an initial brush or dip treatment with either pentachlorophenol (penta) or chromated copper arsenate (CCA). Untreated shingles of all species experienced degradation over a 32-year exposure in western Oregon, but WRC provided the best performance. Penta treatments improved performance to some extent, but the best protection was provided by a dip treatment in CCA prior to installation. The results illustrate the benefits of even shallow surface protection in aboveground exposures.
ISSN:0015-7473
2376-9637
DOI:10.13073/FPJ-D-17-00007