How often should interlock pavers be re-sanded in the Vancouver climate?

Interlock pavers in Metro Vancouver should have their joint sand replenished every 3-5 years, compared to 5-8 years in drier climates. Vancouver's heavy rainfall (over 1,200mm annually) and persistent humidity accelerate joint sand erosion, making regular re-sanding one of the most important maintenance tasks for paver longevity.

Why Metro Vancouver Requires More Frequent Re-sanding

Vancouver's marine climate creates unique challenges for joint sand retention. The region receives approximately 70% of its annual rainfall between October and March, with frequent heavy downpours that wash standard jointing sand out of paver joints. This sand loss destabilizes pavers, allows lateral movement under foot traffic, and creates pathways for weed seeds and moss spores to establish in the joints.

The persistent humidity levels (typically 60-80% outdoors year-round) also accelerate the breakdown of polymeric sand. While polymeric sand hardens when activated with water to resist washout, Vancouver's constant moisture exposure gradually degrades the polymer binders over time. You'll notice this when joints start appearing hollow, weeds begin growing through cracks, or moss establishes in the joint lines.

Signs Your Pavers Need Re-sanding

Watch for joint sand that appears 1/4 inch or more below the paver surface, visible gaps between pavers, moss or weeds growing in joints, or pavers that rock slightly when stepped on. These indicate that joint sand has eroded enough to compromise the installation's stability. Don't wait until pavers are visibly shifting — preventive re-sanding is much easier and less expensive than releveling settled pavers.

Polymeric Sand vs. Regular Sand Performance

Standard play sand or mason sand washes out of Metro Vancouver paver joints within weeks of heavy rainfall. Always use high-quality polymeric sand from manufacturers like Techniseal, Alliance, or Sakrete for re-sanding projects. Polymeric sand costs 3-4 times more than regular sand but lasts 3-5 years in Vancouver's climate versus 3-5 months for standard sand.

Re-sanding Process and Timing

The best time for re-sanding is late spring through early fall (May-October) when you can count on 48-72 hours of dry weather for proper polymeric sand activation. Clean out old sand with a pressure washer or joint scraper, allow joints to dry completely, sweep in new polymeric sand, and activate with controlled water application. Professional re-sanding for a 400 sq ft patio typically costs $400-800, while DIY re-sanding costs $100-200 in materials.

This is an ideal DIY maintenance task that most homeowners can handle with basic tools and attention to manufacturer instructions. However, if pavers have shifted significantly or the base appears compromised, hire a professional to assess whether simple re-sanding is sufficient or if more extensive repairs are needed.

---

Find a Interlock & Paver Contractor

Vancouver Interlock connects you with experienced contractors through the https://vancouverconstructionnetwork.com:

• Vancouver Safety Surfacing Ltd ✓
• Heilman Renovations ✓
• ConstructX Developments Inc ✓