Natural stone is recommended to be fixed with the use of mortar or adhesive on a reinforced concrete slab. If calibrated 30mm or greater paver is to be used, a suitable crush rock base can be used for pedestrian traffic, however we recommend that the pavers be installed using a mortar bed rather than sand to give better stability to the finished product.
Natural Sandstone can have a size variation of up to 3mm therefore it is recommended to lay the stone with minimum of 5-8mm grout gaps. Travertine & Granite have a more precise cutting method therefore have smaller variations from each tile that can be laid with a minimum 3mm gap.
Particular attention should be paid to expansion joints in both their location and installation. Expansion joints should be used at every change in coping direction, at intervals no greater than 3.5 metres, between paving and any walls, wherever there is existing cracking in the foundation or bedding material and wherever there are existing expansion joints being covered over.