This ratio must be adhered to for natural stone to ensure it to have adequate support for the slab.Ĭ) When installing slabs that will have mortar joints, ensure the receiving joints of the already laid slab are lightly lathered. A semi-dry mortar mix using 4 parts sand to 1 part cement is the necessary mix for the mortar bed.
The mortar bed must be prepared for each slab individually, depending on the depth/thickness that/each slab. Following this the area should then be back filled with 150mm sand/gravel 6 parts to one part cement, which is then to be compacted to 100mm.ī) After the complete preparation of the area to be paved is complete, the laying can start.
Follow these four steps to install granite paving slabsĪ) The area to be paved must be dug out to at least 200mm in depth.
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