tender for roof leakage treatment at the base of syntax tank of quarters at nit rourkela. - disconnecting pipes from sintex tank , removing sintex tank from base, replacing the sintex tank on the base after treatment and connecting the pipes as it was with necessary fittings if damaged. 2 removing of old tarfelt from roof slab cleaning the surface , lowering and removing the debris with in 50mtr lead 3 providing and laying app (atactic polypropylene polymer) modified prefabricated five layer minimum 3mm thick waterproofing membrane , mineral top finished reiforced with non-oven polyster matt manufactured by bitumat co. ltd, suprema general membranes ,tamko,sika india pvt ltd ,stp ltd,hydrotech ltd,dr. fixit , prodorite ltdor equivalent, consisting of a coat of bitumen primer for bitumen membrane @ 0.40 ltr /sqm by the same membranemanufacture of density at 25°c , 0.87-0.89 kg/ltrand viscosity 70-160 cps. over the prime coat , the layer of membrane shall be laid usingbutane torchand sealing all jointsetc and preparing the surface by filling undulations with cement mortar (1:6) andcuring the surfacecomplete in all respect ( to be paid separately ) and as per direction of eng-in-charge. 4 20mm cement plaster of mix 1:6 (1 cement: 6 sand) 5 providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering. cement concrete in 1:2:4 (1 cement : 2 sand:4 coarse aggregate 40mm down)