How often should I re-sand a Vancouver paver patio?

You should re-sand your Vancouver paver patio every 3-5 years with polymeric sand, or whenever you notice joints appearing empty, weeds growing through, or moss taking hold. Metro Vancouver's heavy rainfall and persistent moisture make joint sand maintenance more frequent than in drier climates.

Why Vancouver Requires More Frequent Re-sanding

Metro Vancouver receives over 1,200mm of annual rainfall, with 70% falling between October and March. This persistent moisture gradually erodes even high-quality polymeric sand from paver joints. Standard jointing sand washes out within weeks of heavy rainfall, which is why polymeric sand is essential for all interlock installations in this region. Even the best polymeric sand (Techniseal, Alliance, Sakrete) typically needs replenishment every 3-5 years in Vancouver's wet climate, compared to 5-8 years in drier regions like Calgary or Winnipeg.

The combination of rain erosion and Metro Vancouver's mild, humid conditions creates ideal growing conditions for moss, liverwort, and weeds in paver joints. Once organic growth establishes in empty joints, it accelerates sand loss and creates slippery surfaces that become genuine safety hazards during the rainy season. North-facing patios and areas shaded by trees or buildings are particularly susceptible to moss growth and may need attention every 2-3 years.

Signs Your Patio Needs Re-sanding

Watch for joints that appear empty or receded below the paver surface, green moss or algae growth in joints, weeds sprouting between pavers, or pavers that rock slightly when stepped on. If you can easily scrape sand out of joints with a screwdriver, or if joints are less than half full, it's time to re-sand. Don't wait until joints are completely empty — pavers without adequate joint sand can shift laterally under foot traffic, creating uneven surfaces and trip hazards.

The Re-sanding Process

Remove old sand and debris from joints using a pressure washer, joint scraper, or stiff brush. Clean the paver surface thoroughly and allow 48 hours of dry weather before applying new polymeric sand. Sweep polymeric sand into joints until they're completely full, then activate with a controlled water mist (never flood the surface). Proper activation is critical — too little water and the sand won't harden, too much water causes white hazing on the paver surface that's extremely difficult to remove.

When to Hire a Professional

Re-sanding is one of the most valuable DIY maintenance tasks for paver patios under 300 square feet. For larger areas, or if your pavers need releveling or the surface needs deep cleaning before re-sanding, hiring a professional ensures proper joint preparation and polymeric sand activation. Professional re-sanding typically costs $3-6 per square foot including cleaning and materials.

Need help finding an interlock maintenance professional? Vancouver Interlock can match you with experienced contractors from the Vancouver Construction Network who understand Metro Vancouver's unique climate challenges.