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Abstract
This report will summarize work that was jointly funded by SPRI, the RCI Foundation and the National Roofing Contractors Association. The objective of this research program was to determine the potential corrosive effects of new wood preservatives on metal fasteners used in low-slope commercial roofing systems, specifically those used to hold the assemble to wood nailers and to hold the wood nailers in place. Due to environmental and regulatory concerns, the wood industry began using new preservative chemicals. Concern has been expressed that some of these new chemicals may cause corrosion of certain types of metal fasteners. This has been observed in some instances. The report will provide the following information: 1) Background on the potential issues of corrosion of metal fasteners in treated wood 2) Data developed in various labs that identify critical variables that initiate corrosion of metal fasteners in contact with wood using various types of preservatives, along with theories as to why this reaction is occurring 3) Field data from the wood nailer location of low-slope roofing systems located in various regions of the country to determine if the critical parameters necessary to initiate corrosion are present 4) Recommendations as to the proper combination of fasteners and wood nailers that should be used to prevent corrosion
This report will summarize work that was jointly funded by SPRI, the RCI Foundation and the National Roofing Contractors Association. The objective of this research program was to determine the potential corrosive effects of new wood preservatives on metal fasteners used in low-slope commercial roofing systems, specifically those used to hold the assemble to wood nailers and to hold the wood nailers in place. Due to environmental and regulatory concerns, the wood industry began using new preservative chemicals. Concern has been expressed that some of these new chemicals may cause corrosion of certain types of metal fasteners. This has been observed in some instances. The report will provide the following information: 1) Background on the potential issues of corrosion of metal fasteners in treated wood 2) Data developed in various labs that identify critical variables that initiate corrosion of metal fasteners in contact with wood using various types of preservatives, along with theories as to why this reaction is occurring 3) Field data from the wood nailer location of low-slope roofing systems located in various regions of the country to determine if the critical parameters necessary to initiate corrosion are present 4) Recommendations as to the proper combination of fasteners and wood nailers that should be used to prevent corrosion
Date
3/2010
3/2010
Author(s)
Mike Ennis; Cary Black; Stan Choiniere; Andre Desjarlais
Mike Ennis; Cary Black; Stan Choiniere; Andre Desjarlais
Page(s)
75-90
75-90
Source
Roof Consultants Institute
Roof Consultants Institute
Keyword(s)
metal fastener; corrosion; preservative treated wood;
metal fastener; corrosion; preservative treated wood;