SPECIAL REPAIR TO ROOF TREATMENT, MUMTY, MACHINE ROOMS, WATER TANKS AND OTHER CONNECTED WORKS AT ISSA LAB (BLDG NO.M147) UNDER GE (I) RnD DELHI

Demolishing brick tiles covering in terracing including stacking of serviceable material and disposal of unserviceable material outside MoD land complete all as specified and directed.

Demolishing mud phaska in terracing and disposal of material outside MoD land complete all as specified and directed.

Roughening of surfaces of old concrete slab by wire brushing, sweeping, cleaning and washing down with water to remove all loose dust etc. and applying bonding coat on prepared surface with repair polymer SBR of approved make, slurry coat (1 SBR : 3 cement : 1 water) on roof surface etc complete all as specified and directed .

M&L for providing Cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20mm nominal size) roof for water proofing treatment with as in padding on roof,projections of roof etc complete all as specified and directed.

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 manufacture of density at 25°C, 0.87-0.89 kg/ litre and viscocity 70-160 cps. Over the primer coat the layer of membrane shall be laid using Butane Torch and sealing all joints etc, and preparing the surface complete. The vital physical and chemical parameters of the membrane shall be as under : Joint strength in longitudinal and transverse direction at 23°C as 650/ 450N/ 5cm. Tear strength in longitudinal and transverse direction as 300/ 250N. Softening point of membrane not less than 150°C. Cold flexibility shall be upto -2°C when tested in accordance with ASTM, D - 5147. Termination of the membrane at 450mm from the roof level in groove of 50mm x 50mm filled with with PU sealant of approved make. The laying of membarance shall be got done through the authorised applicator of the manufacturer of membrane 3 mm thick complete all as specified and directed.

Providing and fixing Heat Resistant Terrace Tiles (300 mm x 300 mm x 20 mm) with SRI (solar refractive index) > 78, solar reflection > 0.70 and initial emittance > 0.75 on waterproof and sloped surface of terrace, laid over and including 20 mm thick cement sand mortar in the ratio of 1:4 using liquid water proofing compound as per manufacturers instructions(1 cement : 4 coarse sand) and grouting the joints with mix of white cement & marble powder in ratio of 1:1, including rubbing and polishing of the surface upto 3 cuts complete, including providing skirting upto 150 mm height along the parapet walls in the same manner complete all as specified and directed.

Demolishing brick work built in In cement mortar manually/ by mechanical means including stacking of serviceable material and disposal of unserviceable material outside MoD land as per direction of Engineer-in-charge complete all as specified and directed.

M&L Brick work with common burnt clay F.P.S. (non modular) bricks of class designation 7.5 in superstructure above plinth level up to floor V level in all shapes and sizes in Cement mortar 1:6 (1 cement : 6 coarse sand) complete all as specified and directed.

Providing gola 75x75 mm in cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 stone aggregate 10 mm and down gauge), including finishing with cement mortar 1:3 (1 cement : 3 fine sand) as per standard design In 75x75 mm deep chase complete all as specified and directed.

Making khurras 45x45 cm with average minimum thickness of 5 cm cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate of 20 mm nominal size) over P.V.C. sheet 1 m x1 m x 400 micron, finished with 12 mm cement plaster 1:3 (1 cement : 3 coarse sand) and a coat of neat cement, rounding the edges and making and finishing the outlet complete all as specified and directed.