How often should I stain or seal my wood fence if I live in the Lower Mainland?

You should stain or seal your wood fence every 2-3 years if you live in the Lower Mainland — and closer to every 2 years if your fence is north-facing, under heavy tree canopy, or in a particularly rainy area like the North Shore. Metro Vancouver's marine climate with 1,200mm+ of annual rainfall is extremely demanding on unprotected wood, and regular sealing is the single most important maintenance step you can take to extend your fence's lifespan.

Timing is everything in Metro Vancouver. Stain and sealer need at least 24-48 hours of dry weather after application to cure properly, and the wood surface itself needs to be dry before you start. This limits your practical window to May through September, with June through August being ideal. Applying stain to damp wood or having rain within a day of application will cause the finish to peel, blister, or simply fail to penetrate — wasting your time and money. Check the forecast for a stretch of 3-4 dry days before starting.

Choosing the right product matters. A penetrating semi-transparent stain with UV and water protection is the best choice for cedar fences in the Lower Mainland. Semi-transparent stains soak into the wood grain rather than sitting on the surface like paint or solid stains, which means they wear gradually rather than peeling and flaking. When it's time to reapply, you simply clean the fence and apply another coat — no scraping or sanding required. Solid stains and paints look great initially but become a maintenance headache in Metro Vancouver's wet climate because they trap moisture behind the film and peel within 2-3 years.

Prep work before staining: Clean the fence thoroughly before applying any stain or sealer. A pressure washer on a fan tip setting at 1,500-2,000 PSI removes dirt, moss, algae, and mildew. For heavy green growth (extremely common on north-facing fences in Metro Vancouver), pre-treat with a diluted bleach solution or oxygen-based deck cleaner 15-20 minutes before pressure washing. Let the fence dry for 2-3 sunny days after cleaning before applying stain.

How to tell it's time to re-stain: Pour a small amount of water on the fence surface. If the water beads up and rolls off, the existing sealant is still working. If the water soaks into the wood and darkens it, the protection has worn off and it's time to re-stain. You'll also notice the wood colour fading to grey, which is UV damage — not harmful structurally but a clear sign that the surface protection has broken down.

Cost for professional staining runs about $2-$5 per linear foot in Metro Vancouver, including prep work and cleaning. For a typical 100-foot fence, that's $200-$500 every 2-3 years — a modest investment compared to the $4,000-$8,000 cost of a full fence replacement. This is one of the fence maintenance tasks that many homeowners handle as a DIY project, which is perfectly reasonable if you have the time, a pump sprayer or brush, and the patience to do proper prep work first.

Pressure-treated fences need sealing too. A common misconception is that pressure-treated wood doesn't need any maintenance. The chemical treatment prevents rot from within, but the surface is still vulnerable to weathering, cracking, UV greying, and moisture damage. Pressure-treated fences should be sealed on the same 2-3 year schedule as cedar. Wait 3-6 months after installation before the first application to allow the treatment chemicals to dry and the wood to accept the stain properly.

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