Cement slurry bond coat shall be scrubbed to prepare slab prior to placing mortar bed.
The mortar composed of 1 part cement to three parts aggregate complying with BS 1199 Table 1 shall be immediately applied after application of the slurry bond coat and spread evenly.
The finishing coat composed of 1 part cement and three parts aggregate complying with BS 1199 Table 2 and to a thickness of 10mm shall be spread on the mortar bed evenly.
The finish coat shall be spread with cement powder and trowel led to an even and level surface. Surfaces to be finished smooth shall be wood floated. Joints between screed panels shall be accurately located before the spreading of the undercoat. The joints shall be in fiber board of 20mm thickness against which the panels are to be cast.
The soft board shall be removed while the screed is wet and the gap filled with bitumen, fine aggregate mix to the top of the undercoat. The joint to the top of the finish coat shall be flush pointed with 1:2 cement, fine aggregate mix.
