Should I use crushed limestone joints on my Vancouver walkway?

No, crushed limestone is not recommended for paver joints in Metro Vancouver's wet climate. Limestone dust and screenings will wash out of the joints during heavy rainfall, leaving your pavers loose and unstable while creating ongoing maintenance headaches.

Why Limestone Joints Fail in Vancouver's Climate

Metro Vancouver receives over 1,200mm of annual rainfall, with 70% falling between October and March. This persistent moisture creates ideal conditions for joint material erosion. Crushed limestone, limestone screenings, and limestone dust are essentially powdered rock that acts like cement when wet but lacks the binding agents to stay in place during heavy rain events. Within the first few winter storms, you'll notice the limestone washing out of your joints, pooling in low areas, and staining adjacent surfaces with white residue.

Without stable joint material, your walkway pavers will shift laterally under foot traffic, creating uneven surfaces and trip hazards. The gaps between pavers also become entry points for weeds, moss, and organic debris. In Vancouver's humid climate with mild temperatures year-round, moss and weeds establish quickly in empty joints and become a persistent maintenance challenge.

Use Polymeric Sand Instead

For Vancouver walkways, polymeric sand is the only practical joint material. Quality polymeric sand from manufacturers like Techniseal, Alliance, or Sakrete contains binding agents that activate when moistened, creating a flexible yet stable joint that resists washout while allowing for normal thermal movement of the pavers.

Polymeric sand costs more upfront ($25-40 per 50lb bag versus $8-15 for limestone screenings), but it typically lasts 3-5 years in Vancouver's climate before requiring replenishment. Limestone joints need constant topping up after every heavy rain period. A typical 200 sq ft walkway requires 3-4 bags of polymeric sand for initial installation, representing about $100-160 in material cost versus ongoing limestone replacement costs.

Proper Installation is Critical

Polymeric sand must be applied to completely dry pavers and activated with controlled water application - not flooding. Sweep the sand into joints until they're full, remove excess from paver surfaces, then mist lightly with water to begin activation. Too much water during activation causes the polymers to wash out before curing, while too little water prevents proper hardening.

When to Hire a Professional

While homeowners can replace polymeric sand in existing joints as maintenance, new walkway installation with proper base preparation, edge restraints, and initial polymeric sand application is best left to experienced contractors who understand Vancouver's drainage requirements and have the tools for proper base compaction.

Need help finding an interlock installer? Vancouver Interlock can match you with experienced local contractors who understand Metro Vancouver's unique climate challenges.