What kind of primer should I use on the exterior cedar siding of my West Vancouver home before staining?

Cedar siding is the most popular exterior cladding across Metro Vancouver, and choosing the right primer is crucial for a long-lasting finish, especially given our heavy rain exposure. If you are applying a solid-colour stain or paint over bare or previously stained cedar, an oil-based or alkyd primer is generally the best choice. Oil-based primers penetrate deeply into cedar's porous grain, seal natural tannins that can bleed through and cause brown staining, and provide excellent adhesion for the topcoat. Cedar is notorious for tannin bleed, particularly western red cedar, which is the species used on the vast majority of Vancouver-area homes. If tannin bleeding has been a problem on your home previously, look for a primer specifically labelled as a tannin-blocking formula. For cedar that has weathered and turned grey from Vancouver's moisture and UV exposure, the surface must be cleaned and brightened with a wood cleaning solution before priming. This removes the grey oxidized wood fibres and opens the grain for better primer penetration. If you are applying a semi-transparent stain rather than a solid stain or paint, you typically skip the primer entirely, as semi-transparent products are designed to penetrate the bare wood directly. However, you still need to clean and prepare the surface thoroughly. Regardless of product choice, avoid painting or staining cedar siding when rain is expected within twenty-four hours or when temperatures drop below ten degrees Celsius, both of which are common concerns during Vancouver's shoulder seasons. Consult with your painter about the best product system for your specific siding condition and desired look.

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