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Weathering and protection of wood

https://library.fpinnovations.ca/en/permalink/fpipub5576
Author
Evans, P.
Chowdhury, J.
Matthews, B.
Ayer, S.W.
Date
June 2003
Edition
37656
Material Type
Research report
Field
Sustainable Construction
Author
Evans, P.
Chowdhury, J.
Matthews, B.
Ayer, S.W.
Contributor
NRCan Value Added Research Program.
Date
June 2003
Edition
37656
Material Type
Research report
Physical Description
31 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Weathering
Wood decay
Prevention
Preservatives tests
Preservatives
Preservation
Series Number
3496
W-1966
Location
Vancouver, British Columbia
Language
English
Abstract
Wood surfaces exposed to natural physicochemical dynamics (light, rain, wind, air pollution, etc.) are susceptible to environmental degradation during a complicated phenomenon known as weathering. Although biotic factors such as fungal colonization also contribute, electromagnetic energy (specifically ultraviolet and visible light), moisture, and oxygen are the most significant causative agents in the weathering of exterior wood exposed above ground. Wood strongly absorbs ultraviolet light and can dissipate this energy through chemical processes involving free radical formation and reaction with molecular oxygen (O2). Formation of free radicals within the lignocellulosic fibers induces depolymerization of lignin and cellulose, the major structural components of wood. Photodegradation of wood also occurs beneath clear wood finishes, greatly reducing the durability of such coatings when used outdoors. As part of a joint Forintek / CAWP project to develop a surface modification treatment that will improve the weather resistance of wood products (without masking the natural colour and texture of wood), this document provides an overview of the environmental factors and effects, and the mechanisms involved in wood weathering. A review of wood weathering protection strategies published in recent years is given, and future directions are outlined.
Weathering
Lumber - Preservation
Preservatives - Tests
Decay - Prevention
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Comparative evaluation of five sapstain, mould, and decay preventives with sodium tetrachlorophenate by a field trial. Interim report

https://library.fpinnovations.ca/en/permalink/fpipub41149
Contributor
Agriculture Canada
Forintek Canada Corp.
Date
January 1982
Material Type
Research report
Field
Sustainable Construction
Contributor
Agriculture Canada
Forintek Canada Corp.
Date
January 1982
Material Type
Research report
Physical Description
17 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Preservatives
Preservation
Pentachlorophenol
Series Number
W-1361
Location
Vancouver, British Columbia
Language
English
Abstract
Preservatives - Pentachlorophenates
Lumber - Preservation
Documents
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