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Pedestrian Area Sub-base The base should be 50mm to 75mm compacted crushed rock and mortar. Driveway Sub-base A minimum of 25 Mpa cured concrete with F72 mesh (the minimum required by Australian Standards) or larger. Mortar Bed (Recommended) Lay your Riverstone Pavers on a mortar bed consisting of a 4:1 equal parts sand cement. The sand should be well graded washed sand. Add fresh clean water until the mix is workable but not too wet. The mortar mix should be of sufficient consistency to enable the pavers to be laid on the screed without settling. Mark the smooth surface with a 'pattern' to enhance the bonding process between your Riverstone Paver and the mortar bed. Crucial to the successful laying and durability of Riverstone is the brand of cement used: builders cement is not recommended. A quick drying, general purpose off-white cement is the best option for laying Riverstone Pavers, keeping in mind that it is not recommended to use cement products in temperatures exceeding 30 degrees C. Dry Laying Use a compacted, crushed rock base (preferably stabilized). Sand and cement mix should be about 4:1 and screeded. When laying, wet the sand and the back of your Riverstone Pavers. Pavelock or similar should be used when grouting. Laying Ensure the back of your Riverstone Paver is wet before placing on the mortar. Bed down with a tradesman quality rubber mallet. It is very important there are no air pockets left under your laid Riverstone Pavers. If the mortar bed is uneven and voids are left between your Riverstone Pavers and the mortar bed, or your Riverstone Pavers are not bedded correctly, there is a possibility the adhesion between your Riverstone Pavers and the mortar will fail. Do not use a whacker plate on Riverstone Pavers. At the end of the day, lightly spray your Riverstone Pavers and cover with plastic to ensure the proper curing of the mortar. For steps and pool copings it is recommended that a bonding agent be applied to the back of your Riverstone Paver before laying on your mortar screed. Swimming Pools It is recommended that paving surrounding swimming pools be laid on a concrete slab to help prevent differential movement between the paving and the pool. There should be an expansion joint between the paving and the pool (or the paving and the pool coping). Areas around pools, especially salt-water pools, should be sealed with a non-slip penetrating sealer Expansion Joints Expansion joints should be placed every 4-5m or alternatively to match existing joints in concrete slab, with a 10mm width. Grouting Wet your Riverstone Pavers before the grouting procedure starts. Riverstone Pavers can be slurry grouted or grouted with a gun, or a stiff mix trowelled into the joints. Clean excess grout off immediately to avoid staining or sticking.   Cleaning When completed, the job should be washed using Hydrochloric acid. Lightly wet your Riverstone Pavers before starting. Use an acid wash 1 part acid to 20 parts water and scrub with a stiff brush appropriate for the job. Rinse afterwards with a detergent and water mix to neutralize the acid. If the pavers obtain a hazy appearance acid wash again, or use phosphoric acid or an efflorescence wash. Traffic It is recommended that the pedestrian areas do not have traffic for 48 hours and for driveways do not load area for 3 weeks after the area is complete. Sealing your Paving In line with common practice and for the best results and longevity of the pavers, we recommend sealing your Riverstone Pavers after laying. Areas around pools, especially salt-water pools, should be sealed with a non-slip penetrating sealer DOWNLOAD a PDF Laying Guidelines March 2005 (34.2KB) Download the latest version of Adobe Reader

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