bids are invited for surface preparation clean top surface of roof rcc slab using electric wire cup grinder to remove surface imperfections , surface crack repair cracks on top surface rcc slab wider than 1mm required to be cut and open in v groove manner , surface crack repair , rainwater outlets treatment hacking and chipping the surface around the rainwater drain outlet up to 25mm in depth , waterproofing application premix of two component high strength hybrid urethane elastomeric waterproofing coating using an electric double paddle mixer , prepare the joint by cleaning all loose material dust and debris substrate moisture must be less than 4 percent , screed repair in pockets as required remove loose and damaged concrete roof screed in pockets with mechanical cutter total quantity : 2948