jointsand

Jointsand, often referred to as joint sand, is a granular material used to fill and stabilize the joints between paving units such as bricks, concrete or natural stones. It helps keep the units in place, reduces weed and insect intrusion, and provides a stable, even surface. Jointsand is commonly used for patios, driveways, walkways, and other paved areas.

There are two main categories of jointsand. Non-polymeric joint sand is a dry, silica- or quartz-based material that is swept into joints and compacted to create frictional resistance. It remains loose enough to allow drainage but tight enough to restrict movement. Polymeric joint sand contains binders or fines that, when activated by water, form a solid, flexible joint. Polymeric sands tend to resist washout and weed growth more effectively and can improve surface stability in some conditions.

Typical installation involves cleaning the joints, ensuring proper joint depth and width, and sweeping the sand evenly into the gaps. For non-polymeric sand, joints are compacted and excess material brushed away after settling. For polymeric sand, the area is usually lightly misted with water to activate the binder, then allowed to cure according to the manufacturer’s instructions. Maintenance may include periodic re-sanding of washed-out joints or, in the case of polymeric sand, reactivating or replacing the joints after several seasons.

Safety considerations include avoiding excessive dust exposure when handling dry sands, using appropriate masks and eye protection, and following local guidelines for dust containment and drainage. Environmental considerations emphasize preventing sand run-off into nearby waters and minimizing soil disruption during installation.