bids are invited for roof treatment of various buildings at nalco mines, damanjodi. item no.1 - dismantling of old tar felting from roof & parapet wall & stacking dismantled tarfelts within a lead of 100 mtrs including all labours, tools & tackles etc. all complete ar per e-i-c. , roof treatment of various buildings at nalco mines, damanjodi. item no.2 - providing and fixing on wall face unplasticised rigid pvc rain water pipes conforming to is : 13592 type a, including jointing with seal ring conforming to is : 5382, leaving 10 mm gap for thermal expansion, (i) single socketed pipes.110 mm diameter with all fixtures such as bendoffsets shoe etc. , roof treatment of various buildings at nalco mines, damanjodi. item no.3 - providingandlaying 12 mm thick cement plaster in cement mortar 1:6 (1cement: 6sand) on the rough sides of single or half brick wall or masonary work using approved type sand including curing etc. all complete for all heights.(cement shall be issued free of cost from nalcos store) , roof treatment of various buildings at nalco mines, damanjodi. item no.4 - dismantling old plaster or skirting raking out joints and cleaning the surface for plaster including disposal of rubbish to the dumping ground within 50 metres lead. , roof treatment of various buildings at nalco mines, damanjodi. item no.5 - disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by engineer-in-charge, beyond 50 m initiallead, for all leads including all lifts involved. , roof treatment of various buildings at nalco mines, damanjodi. item no.6 - providing and laying app (atactic polypropylene polymer) modified prefabricated five layer 3 mm thick water proofing membrane, black finished reinforced with non-woven polyester matt consisting of a coat of bitumen primer for bitumen membrane @ 0.40 litre/sqm by the same membrane manufactu