West Bengal State Electricity Distribution Company Limited Tender

Supplying & laying 3mm thick pre-fabricated plastomeric water proofing membrane conforming to EN 12311-1 & ASTMD 5147, manufactured with atactic poly propylene (APP) modified premium grade asphalt , specially reinforced with non-woven polyester core with polyester reinforcement @160 gms per sqm & both faces covered with thermo-fusible polyethylene film /MineraL on top face over a coat of primer @ 0.40 lit/sqm of manufacturer's specification on smooth,clean dry surface prepared wherever required.Lap joint shall be provided of 75 mm in longitudinal & 100 mm in transverse direction and fused using LPG/ Propane torch employing extra care ensuring full bondage, complete removal of entrapped air and sealing edges into grooves in appropriate manner as per direction of Engineer -in-charge all complete including materials,labour and applicable taxes. (Payment shall be made on the basis of finished surface area.). Membrane Property: Softening Point 150 deg C, Cold Flexibility -6 deg C, Tensile Strength, N/cm : 600 (longitudinal), 450 (transverse), Tearing Strength, N: 300 (longitudinal), 200 (transverse)

Repairs to cracks in terraced roof by cutting V-grooves 75 mm. to 100 mm. deep and 150 mm. to 200 mm. wide and filling the same with beaten lime concrete (2:2:7) with lime putty / paste and finishing complete (2 lime putty / paste : 2 surki : 7 brick khoa )

Labour for painting roof surface with Bitumen (using 135 kg (avg.) per % Sq.m.)including cleaning roof, heating bitumen as directed and spreading sand and complete including cost of sand @ 0.6 cu.m. per % Sq.m. and cost of carriage of Bitumen from deptt godown but excluding the cost of bitumen. (If heating is not reqd. then deduct Rs.3.45/- per Sq.m)