SPECIAL REPAIR TO EXISTING ROOF OF BLDG NO P-185 ERG AT 508 ABW CHHEOKI

Struking of existing PCC/ Cement floor surface 10 to 15 mm deep picking,sweeping, clean and washing down with water to remove dust to receive cement mortar/ PCC for flooring, including removing old APP membrane with cement debris and rubbish off the premises complete all as specified and directed.

M&L for Cutting grooves in brick wall / RCC wall 75mm wide and 40 -60 mm deep and shaping horizontal face of groove with cement mortar 1:3 complete all as specified and directed.

M&L for PCC 1:3:6 type B-1 (using 20mm graded stone aggregate) for providing cement concrete as levelling and roof kerbs or mud stops, including finishing the surface with grinder to receive the acrylic based water proofing material, rounded or chamfered on edges etc complete all as specified and directed.

M&L for rendering or bedding layer 15mm thick in cement mortar (1:3) cover concrete surfaces of roof, mixed with WPC 2% wt of cement inclduing finishing surfaces even and fair without using extra cement complete all as specified and directed. Note: WPC will be measured and paid separately. Items will be executed while concrete of item no 03 is still green.

M&L for preparation of new surface and applying a coat of hot blown bitumen of grade 85/25 conforming to IS 702 over primed surface of roof slab @ 1.20 Kg/Sqm complete all as specified and directed.

M&L for APP based polymeric water proofing membrane minimum weight 3 Kg/Sqm and minimum 3mm thick reinforced with polyster non wove febrick (Weight not less than 150gms/Sqm or as per IS), laid over hot bitumen surface by torched application with the strict supervision of manufacturers technical supervisor. Membrane shall be laid with 100mm side/end lap on prepared surface as per manufacturer instruction work shall be carried out strictly with the technical tradesmen and supervision of technical staff of manufacturer complete all as specified and directed.

S&F in repair for Aluminium strip 25 x 3.15mm with saddles and fixing screws / clips / Rawl plug etc for roof conductors and down conductors above ground complete all as specified and directed.

Taking down carefully old existing GI/Aluminium Strip of size up to 25X3.15 mm including saddles / porcelain insulators with fixing screws from wall etc and refxing the same on new porcelain insulators / saddles as required at site with help of screws/ clip / Rawlplug etc complete connection with test point complete all as specified and directed.

S&F for Air termination, single pointed aluminium rod 12mm dia and 300mm long complete all as specified and directed.

Supply and fixing Heat Resistant Terrace Tiles (300 mm x 300 mm ) 9 to 10 mm thick with SRI (solar refractive index) > 78, solar reflection > 0.70 and initial emittance > 0.75 on waterproof and loped surface of terrace, laid on 20 mm thick cement sand mortar in the ratio of 1:4 (1 cement : 4 oarse 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 in the same manner complete all as specified and directed.