Brickbat Coba Terrace waterproofing contractors in Vadodara Procedure of Brickbat Coba Waterproofing 1. Surface Preparation In the case of existing treatment, the coating on the slab top shall be removed, and surface cleaned by hard wire brush and washed with water. In the case of a new slab to be cast, the surface of the concrete must be roughened by scraping. In case the slab has already been cast, and the surface is fairly finished, the same shall be cleaned neatly of all mortar droppings, loose materials, etc.consists of laying brickbats on the flat RCC roof and grouting the same with waterproofing compound with a slope to drain the surface water. 2. Application of Slurry and Base Coat The slurry is prepared with cement and water to a required consistency. It shall be applied over the dampened surface with brushes very carefully, including the joints between the floor slab and the parapet wall, holes on the surfaces and joints of pipes in masonry or concrete.The laying of a 25mm thick base coat is carried out soon after the application of slurry when the application is still green. The cement plaster of 25 mm thick with a mix ratio of 1:4 is evenly applied over the concrete surface. 3. Placing of BrickBat While the base coat is still green, brickbats of the size (65mm to 120mm) are placed with a gap of 15 and 20mm. The brickbats shall be wholly burnt and are well soaked overnight before laying. 4. Laying of Protective Coat A waterproofing compound confirming to IS 2645 is blended with the cement water mixture as per the manufacture specification. However, not more than 3 % of the waterproofing compound shall be used per 50 Kg of grey cement.A cement mortar of a 1:4 ratio is prepared with the waterproofing compound and applied over the surface, including the haunches/ gola and 300mm on the parapet wall. 5. Curing The entire surface thus treated shall be flooded with water by making bunds with low cement mortar. The curing shall be carried our for a minimum period of 2 weeks.