Why are joint lines visible after a Vancouver paver re-sand?

Visible joint lines after re-sanding are completely normal and expected — they indicate the polymeric sand is properly filling the joints. Fresh polymeric sand creates distinct, uniform lines between pavers that will soften and blend naturally over 2-4 weeks as the sand cures and weathers.

When polymeric sand is first applied and activated, it appears as clean, sharp lines because the sand is freshly installed and hasn't yet accumulated the fine dust, organic matter, and slight weathering that makes older installations look more blended. This is actually a sign of proper installation — the joints are fully filled, the sand has been properly activated with water, and excess material has been cleaned from the paver surfaces.

The appearance will naturally soften over time as Vancouver's frequent rainfall washes away any surface residue, UV exposure begins the gradual weathering process, and normal foot traffic works the sand slightly. Within a month, the joint lines will look much more integrated with the overall paver surface. This weathering process is accelerated in Metro Vancouver's marine climate compared to drier regions.

What you should see immediately after proper re-sanding: Clean, uniform joint lines filled flush with the paver surface, no gaps or low spots in the joints, no polymeric sand residue or haze on the paver faces, and joints that feel firm when pressed (indicating proper activation). The sand should be slightly below the paver surface — not mounded above it — to allow for the natural expansion that occurs as the polymeric sand fully cures.

Concerning signs that indicate installation problems: Joints that appear empty or significantly below the paver surface, white haze or film on the paver faces (indicating over-watering during activation), joints that feel soft or loose when pressed, or sand that appears to be washing out during the first rainfall. These issues suggest improper application or activation of the polymeric sand.

In Metro Vancouver's wet climate, properly installed polymeric sand typically lasts 3-5 years before requiring replenishment. The initial sharp appearance of fresh joint lines is temporary and normal — resist the urge to disturb or "blend" the sand during the first month of curing.