First class dry flat brick flooring and paving in ordinary bonded courses or in herring bond or other special courses or bond laid to template over rammed and dressed foundations and to correct longitudinal and cross slopes as shall be required by the Engineer-in-Charge. All joints shall be thoroughly filled with dry sand grouting which shall be applied to a thickness of not less 20mm over the surface of the flooring and brushed into the joints. All joints shall be fully filled with sand.