The oldest and the most preferred treatment is BRICK BATE COBA method:
Cleaning the surface to provide good waterproofing treatment in cement based with Waterproofing compound 'LEAK PROOF'( 1 kg in every 50 kgs of cement bag mixing). On roof the honeycomb` s are grouted first, then a layer of half brick bate is fixed in uniform level with CM1:4 mixed with ``leak proof`` water proofing chemical, and providing sufficient slope to facilitate easy drainage of rain water.After fixing brick bate the joints of bricks are filled with CM 1:4 with chemical compound, the parapet wall waterproofing plaster comes 9 inches in height in a corce shape with CM 1:4 with chemical compound the top of the brick bate coba applying jointless. Finishing smoothly in CM 1:4 with chemical compound and 300 mm square falls comes on the finishing.(average thickness of the treatment is 110 mm)