Exterior cedar wood
Information on oil selection, sealing, and maintenance cycles suited to Canadian climate conditions.
Articles
Three detailed topics covering essential cedar exterior treatment and protection.
Wood preparation, choosing the right oil, and applying multiple coats based on cedar type and exposure to the elements.
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Techniques for treating vertical and horizontal boards exposed to weather in regions with heavy seasonal humidity.
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Seasonal inspection schedule, cleaning, light sanding, and renewing treatment to extend the life of the wood.
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Western red cedar (Thuja plicata) and eastern white cedar (Thuja occidentalis) are the two species most used for exterior construction in Canada.
Cedar contains thujaplicins, organic compounds that slow decay from fungi and insects. This natural resistance diminishes over time if the wood is not maintained.
Freeze-thaw cycles common in provinces such as Quebec and Ontario accelerate the natural greying of untreated cedar. Coastal regions of British Columbia expose wood to persistently high humidity.
Penetrating oils, semi-transparent stains, and film-forming coatings offer different levels of protection. The choice depends on sun exposure, surface orientation, and how often you want to maintain the wood.
Resources
The information on this site draws on public data from recognized Canadian organizations in forestry and construction.
Canada's national body representing lumber producers publishes technical guides on the properties and uses of native species, including cedar.
The federal site provides data on Canadian forest species, their mechanical properties, and their use in residential construction.
A Canadian non-profit forest research centre that publishes technical reports on the durability and performance of wood products outdoors.