ADDN/ALTN AND SPECIAL REPAIRS TO TRG INFRA TO CERTAIN BLDGS UNDER GE (C) KHADKI.

M&L for APP-based modified pre-fabricated five-layer waterproofing membrane, 3 mm thick and weighing not less than 3.6 kg/m², reinforced with polyester non-woven fabric mat (160 g/m²), black finished. The surface shall be primed with compatible primer conforming to IS 3488 @ 0.30 L/m² and IS 17029 bonding material 85/25 bitumen @ 1.2 kg/m² before and after laying.The membrane shall be laid by torch method with side overlaps of 75 mm and longitudinal overlaps of 100 mm. At junctions of roof and parapet walls, a groove of 20 × 20 mm shall be provided at a height of 100 mm, into which the membrane shall be inserted and sealed with bituminous mastic. All overlaps/joints shall be sealed with hot 85/25 bitumen.Finally, two coats of waterproofing aluminium paint shall be applied over the APP membrane. Work to be executed as per specifications and directions of Engineer-in-Charge.

Dismantling of existing waterproofing treatment on roof including screed bed and scrubbing down with water etc and disposal of unserviceable materials complete all as specified and as directed

Material and labour for laying 10 mm thick screed bed on concrete roof surfaces, in cement mortar 1:3 finished fair and even, without using extra cement by incorporating Dr. Fixit (or equivalent approved) at 3% by weight of cement content. The work shall include all necessary materials, tools, and labour for Complete all work as specified and directed by the Engineer-in-Charge.

Supply only water proofing compound all as directed Make : Dr Fixit or equvalent

Dismantling of asbestos cement sheets of any size,descriptionn in roofing ,including removal of sheets and disposal of unserviceable materials. Note: Work to be executed up to any height of the building, including all necessary scaffolding, safety arrangements, and making good disturbed surfaces, complete all as specified and as directed

Dismantling of plain or corrugated/galvalume steel sheet/mild steel sheet in valley gutter,any size and description ,including removal of sheets and disposal of unserviceable materials. Note: Work to be executed up to any height of the building, including all necessary scaffolding, safety arrangements, and making good disturbed surfaces, complete all as specified and as directed

Dismantling of single layer of Mangalore or similar pattern tiles in roofing laid in dry, including removal of tiles, stacking of serviceable materials, and disposal of unserviceable materials. Note: Work to be executed up to any height of the building, including all necessary scaffolding, safety arrangements, and making good disturbed surfaces, complete all as specified and as directed

Supply and fix pre-painted Galvalume aluminium-zinc coated GI based corrugated steel sheets, 0.50 mm thick,150 GSM, colour as approved by Garrison Engineer, having tensile strength of 550 MPa, used as roof covering or wall cladding, fixed with self-tapping screws, L-hooks, J-hooks, or cranked bolts as required, including all necessary cutting, alignment, and making good disturbed surfaces, complete all as specified and as directed.

Supply and fix pre-painted Galvanished mild steel sheets, 0.63 mm thick, colour as approved by Garrison Engineer, having tensile strength of 550 MPa, used as ridges,hips,valley gutters,drip and straight flashings (length and girth as fixed) fixed with self-tapping screws, L-hooks, J-hooks, or cranked bolts as required, including all necessary cutting, alignment, and making good disturbed surfaces, complete all as specified and as directed.

Supplying and fixing plain galvanized mild steel sheeting for ridges, hips, valley gutters, drip and straight flashing (length and girth as fixed), using 1.00 mm thick galvanized steel sheets with zinc coating 120 g/m² on both sides, including welded or soldered joints, making all required shapes for valley gutters, refixing sheets, providing supporting brackets of any description, complete as specified and directed by the Engineer-in-Charge