Lay back the brickbat coba to provide water proofing is so desired.Materials:?? Water proofing seal slurry?? Water proofing guard?? Fiber mesh?? Proof solution?? Polymer (chemical) WATER PROOFING OF EXISTING STRUCTURES LIME COBA AND LIME CHEKA COBAThis is a system used particularly for roofs in the coastal region and consists of putting brickbat on roofs to give a slope and then grouting the same