To prevent weeds from growing, you need to sand lock your pavers after installation. A lot of contractor uses sand but we use stone dust which is swept on the surface of the installed paving stones and allowed to go to the full
depth of the joints.
Please ensure the stonedust that is used to lock the joints are swept into the joints, otherwise it can wash out and leave a sticky mess on the pavement surface that will be difficult to remove on the paving stone.
Filling the Joints: Evenly spread the stonedust over the surface of the paving stone. Use a broom to sweep the mixture into the joints. Continue this procedure until all joints are full and sand can no longer be pushed into them.