Apply Bituminous APP modified and thickness not less than 4mm slated finish water proofing membrane or equivalent material for concrete roof slab and gutters of the building. Application shall be in accordance with the operational, technical and details instructions and specifications of the manufacturer. the membrane shall be :- Produced by a currently valid ISO certified firm, marked and labeled by an embedded print showing.Material name and type specifically the manufacturers.SizesManufacturing/expiry dateStandard to comply with guarantee for its material and applicationSupplemented by different proper materials produced by the same manufacturer for a detail works of application and treatment like a vent, down pipes mouth, spouts, flashings etc.Accomplanied by original technical specification.The cost shall include cleaning of all dirts and dust materials.The work shall include testing of roof leakage after completion of the work.