Lay a suitable sub base material such as a crushed hardcore well compacted onto the subgrade. This is followed by a 30-50mm laying course of concrete made up of 6 parts sharp sand and 1 part cement.
ALL NATURAL STONE MUST BE LAID ON A FULL BED OF CONCRETE THAT SUPPORTS THE WHOLE FLAGSTONE.
Before laying the flagstone the application of a priming slurry such as Nexus Projoint Porcelain Primer to the underside will improve adhesion.
Carefully lay the flagstone and tap into place with a rubber mallet to the correct level. Place next flag with an adequate joint and continue with the appropriate laying pattern.
NB: as with all natural stone flags the top is the widest surface.
Lay full flagstones first and complete the cuts at the end. After a few days, the joints can be pointed with a mortar made up 4 parts washed sharp sand to 1 part cement. Alternatively, joints can be filled using a propriety jointing compound. All Stone Paving flagstones are designed to be laid with joints.
All cement stains from the mortar must be washed off immediately or the flagstones will be permanently stained. The use of acids to clean off mortar or other stains is not recommended as it can have a detrimental effect on the product.
When laying circles start from the centre stone and work outwards. If contained within a patio lay circle first.
On the very light coloured flagstones consideration should be given to using a white cement together with a bonding agent in the mortar as this minimises absorption of the darker cement onto the flagstone.