We just had a new pergola built with cedar posts and beams. What's the best way to stain it in this climate?
We just had a new pergola built with cedar posts and beams. What's the best way to stain it in this climate?
Cedar pergolas are a West Coast staple, and finishing them properly from the start will save you years of maintenance headaches. In Metro Vancouver, a semi-transparent penetrating stain is generally the best choice for cedar pergolas because it allows the wood grain to show through while providing solid moisture protection. Avoid film-forming products like solid stains or varnishes on pergola beams, as they tend to peel and flake in our rain-heavy climate, creating an ongoing maintenance burden. Before staining, let new cedar weather for four to six weeks so the wood's natural oils dissipate enough for the stain to penetrate properly. Lightly sand the surface with 80-grit sandpaper to open the grain, then clean off all dust. Apply the stain on a dry day when temperatures are between 10 and 25 degrees Celsius, which is easiest to find in late spring or early fall here. Pay extra attention to end grain on posts and beam cuts, as these areas absorb moisture fastest and cause the most rot in our climate. Two coats on end grain is a good practice. For overhead beams and rafters, a stain with built-in UV inhibitors is worth the premium since the top surfaces take direct sun exposure all summer. Plan to re-stain your pergola every two to three years for best results. Consider getting a professional quote that includes light sanding and cleaning before your first re-stain to establish a good maintenance cycle.
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