Paving Techniques

Paving

Schist paving stone is supplied to site in random sizes and shapes ranging from 300 sq up to sometimes over 1m sq. Thickness of paving will vary depending on the load that it will be required
to take. Standard paving stone for domestic use on footpaths, decking etc is approximately 30-40mm. For a vehicular access thicker stone up to 50mm thick is required. The substrate material used for the heavier loads needs to be more substantial, this often includes steel mesh to reinforce the bed.

Method of Laying

Prepare a bed of compacted base course up to 80 – 100mm of the finished height of stone.
A mortar mix of Portland Cement and washed East Coast sand to one part cement to
3 – 4 parts sand. Stone should be placed firmly down into the full mortar bed. The face placed
into the mortar bed should be wiped over to moisten it. Use a rubber mallet to tap down the entire top face of the paving stone into the wet mortar. Check to see that the entire face has come in contact with the mortar by lifting stone, if dry patches are visible more mortar needs to be added so the stone is completely bonded. Bed the pavers down to the required finished level.

Grouting.

Oxide additives are often used to achieve a contrasting colour to the stone paving. Great care must be taken to add exactly measured amount of oxide to mortar mix. Stone should be dampened with a fine mist spray. Apply grout into joints until filled flush with the top of the stone. Once the grout has hardened off slightly brush the excess grout material with a broom then clean off stone with a dampened sponge.