FescoStone Seaming sand

Base

• Both the paving stones and the outside temperature +10 °C to +25 °C
• The paving stones are clean and dry
• The paving stones have been laid in accordance with the requirements of the manufacturer
• The paving stones must be prevented from shifting
• The edges of the paving are supported by kerb stones or concrete

Spreading the sand

• Sweep sand into joints or spread it with a trowel.
• Compact sand into joints using a plate compactor to make sure that the joints are completely filled.
• Check with the manufacturer that the paving stones can withstand the vibration of the plate compactor
• The joints must be filled with FescoStone for the product properties to last.
• Add sand into the sunken joints and sweep the surface to make sure that it is free of any excess sand.
• Sweep at a 45-degree angle for the joints to fill evenly.
• Wash off all excess product with a pressure washer. Be careful with the water pressure, and spray the water diagonally so that the sand does not wash away from the joints. 
• Only use a small amount of water to prevent the binder in the grout from separating from the aggregate. In addition to this, use a brush to remove the binder from the surface of the stones.
• Use only clean water to wash, not detergents.
• Wash thoroughly, any remnants can colour the paving stones grey. 
• After the wash, the temperature must be above +10 °C for the product to harden. 
• Plan your work so that the joints will have at least two days to dry before rainwater starts to strain the joints.
• Rewash the surface 2 to 3 days after the first wash, if there is still any binder left on the paving stones.
• To ensure that the product keeps its weed-resistant qualities, check once a year that there is enough FescoStone in the joints.
• The maintenance interval is 2 to 3 years depending on the local conditions.