A series of long-term field tests have been evaluating the performance of various preservative treatments for shakes and shingles. This report updates the performance data for these products. CCA continues to be highly effective in protecting shakes. After 45 years in test, western redcedar shakes treated with CCA-B remain serviceable. After 20 years in test, pine and spruce shakes, treated with CCA, had no confirmed decay. ACQ-D and CA-B were effective in protecting western redcedar shingles, with little decay observed after 15 years of exposure. Propiconazole and oxine copper were associated with greater levels of decay and would not be recommended for protecting western redcedar shingles at the retentions evaluated. Longer exposure time is needed to evaluate the efficacy of the DDACarbonate and alkylamine oxide treatment.
Decking markets in Canada lack options of hybrid designs and are generally limited to smooth 5/4” or 2x6” of either pressure treated wood, cedar, tropical hardwoods or wood plastic composites. Profiled decking has been unsuccessful in entering the Canadian market on a large scale even though globally it is more prevalent. This report looks to leverage FPInnovations’ expertise to identify opportunities to improve the stability, durability, performance and competitiveness of wood decking by combining profiling and treatment with additional non-wood materials. This information will be used to develop prototypes of novel wood-based decking products that would suit the needs of Canadian consumers as well as maintaining or expanding the solid wood decking market for Canadian producers. Six hybrid decking models were conceptualized to address market concerns about wood decking.
A properly treated boomstick will prevent marine borer attack, thereby increasing the service life of the boomstick. This quick list of guidelines supplements the more detailed user guide produced by FPInnovations.
A properly treated boomstick will prevent marine borer attack, thereby increasing the service life of the boomstick. The coastal forest industry asked FPInnovations to develop a user guide for their field staff as a result of a successful service trial of chromated copper arsenate-treated boomsticks. This user guide will assist industry with the successful implementation of the treated boomsticks.
