SPL REPAIR TO ROOF TREATMENT AND EXTERNAL PLUMBING OF BLDG NO P-63 AND P-2 OF HQ 91 SA AND PROVN OF RAIN WATER HARVESTING AT 1 NAGA (DRAS) UNDER GE (WEST) JRC

Dismantling of brick tiles single layer as in roof covering complete all as specified

Demolition of mud in roofs any thickness including plastering and leeping (whether full thickness removed or only a part thereof) including cleaning the surfaces with wire brushes and water jets all as specified.

Roughening surfaces of old concrete floor by picking, sweeping clean and washing down with water to remove dust, etc.

M & L brushing neat cement slurry with 3kg of cement per sqm complete all as specified

M&L for P.C.C 1:2:4 type B-0 (using 20 mm graded stone aggregate) as in padding over roof finished and laid to required slope complete all as specified and as directed.

M&L, for cement concrete 1:2:4 type B-0 using 12.5mm graded stone aggregate as in coping and roof kerbs on roof chamfered on edge incl troweling slightly complete all as specified and directed.

M&L for 10 mm thick rendering in cement mortar 1:4 on concrete surfaces when concrete is still green finished even and fair including mixing of water proofing compound as per manufacturer instruction etc complete all as specified and as directed. Note :- Water proofing compound shall be measured separately.

Supply only Liquid water proofing compound complete all as specified and as directed of as per manufacturer instruction.

Providing and applying liquid Polyurea-PU based hybrid elastomeric water proofing membrane (Including nylon mesh) at existing/newly constructed roofs, RCC structure like basement raft, retaining wall, water retaining structure, tunnels/subways and bridge deck etc. in two or more coats. The product must have pot life of >90 mins., tensile strength > 12.6 Mpa, elongation of > 500% conforming to ASTM D 2370 & puncture resistance of >200 N as per ASTM E 154 with min. consumption of 1.5 Kg per sqm for 1.2mm DFT in two- three coats. The surface needs to be primed with water soluble self impregnated epoxy primer in two coats to be applied @ 200-250 gms/sqm/coat prior to Polyurea -PU application. Furthermor, (in case the substrate is not suitable) 15mm plaster is advisable for surface prepration before application of the water proofing membrane to avoid pinholes or functional difficulties of the system (Make - Berger STP) Note:- The application shall be done by the authorised applicator of the manufacture with a letter of proof stating the authenticity of the applicator firm.

Taking up or down existing steel 20 mm tubing and connections including cleaning for refixing or removal to store complete all as specified and as directed