ADDITION/ALTERATION OF ROOF TREATMENT, ROOF REPAIR, PLASTER BRICK WORKS AND MISC WORK AT ROOF TOP OF MTNL BUILDING, MALABAR HILLS

Note - (i) Work to be carried out on GL to 08th floor (including structures on terrace of build) from ground levels (ii) Rate for scaffolding in any location and safety system for labour are included in quoted rates by contracter .) (iii) Safety Net and Water proofing covering materials shall be arrange by contracter while working at site and it will be deem fit in quoted rates by contracter. (iv) For All debris/waste disposal contractor shall be responsible (v) This note is applicable for all items (IV) THE WORK SHALL BE COMPLETED WITHIN AN EMERGENCY TIME FRAME BEFORE THE MONSOON SEASON. THE CONTRACTOR SHALL QUOTE ACCORDINGLY. Dismantling Stone slabs ( embeded with cement or concrte with mosiac, ceramic tiles , granite & marble stone etc ) and tiles of any description or thickness in floors, aprons,parapet wall etc laid,bedded and pointed in any mortar ,and rubbish off premises complete all as spd and as directed by Engineer in Charge.

Removing of all vegetation ,small plants / roots etc, of girth n. exc. 30 cm each ( item shall be included in clearence of 1 sqm area ) from wall/ roof/ chajjas of bldgs, by cutting holes and making good in CM / PCC of required grade, upto various floor including pouring of concentrated sulphuric acid to avoid regrowth of the same to the satisfaction of Engineer-in-Charge.

Demolition of cement concrete Roofs , floors (other than ground floors), beams, staircases, landing, chajjas,para and similar suspended work and rubbish off premises complete all as spd and as directed by Engineer in Charge.

Taking down cement plaster on brick or stone walls, etc. including raking out joints, hacking for key, scrubbing down with water, etc.complete all as spd and as directed by Engineer in Charge.

M&L Cement concrete type B-1 40 mm thick, 1:2:4 (20mm graded aggregate) laid in roof surfaces with proper slope to drain pipe as directed complete all as spd and as directed by Engineer in Charge.

Applying in Screed bed or bedding layer of mortar 10 mm thick for laying in roof top flooring as complete all as spd and as directed by Engineer in Charge.

M&L Brick work with sub class B bricks straight or curvedd on plan exc 6m mean radius built in CM 1:4 complete all as specified and directed by Engineer-in-Charge.

M & L for rendering 15mm thick cement plaster on external surfaces of brick or concrete wall surfaces/ceilings in cement motar 1:4 of cement and surfaces finished enen and fair without using extra cement using with WPC ( WPC Shall be paid separately & using only Wherever specified by the Engineer-in-Charge ) all as specified and directed.

M&L for plain cement concrete( 1:2:4) type B0 using 12.5mm graded stone aggregate as in coping, kerbs or mud stops or rounded, chamfered in edges and benching ,including form work complete all as specified . Note :- This item rate shall be included for formwork ( Straight or curved )

M&L in Reinforced cement concrete M 25 (design mix) Slabs supported on walls, beams and columns in floors, roofs, landings, balconies, can complete all as spd and as directed by Engineer in Charge.opies, deck slabs and in shelves and the like complete all as spd and as directed by Engineer in Charge.

M&L Mild steel TMT bars 6mm to 8mm dia, cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9mm dia or securing with clips complete all as spd and as directed by Engineer in Charge.

Formwork to soffits of suspended slabs such flat surfaces as roof slabs, floor slabs, landings and similar work; not exceeding 200mm thick (Horizontal or sloping) Rough finished surfaces of concrete complete all as spd and as directed by Engineer in Charge.

M & L for rolled Fe 410 (Gde E-250 A quality) mild steel Joist, channel, angle, or tee sections, fixed independently, without connecting plates, etc. (cut to ordinary lengths i.e. within 20mm of the length indicated) complete all as spd and as directed by Engineer in Charge.

Dismantling cast iron work of any description included with embedded with pcc etc complete all as spd and as directed by Engineer in Charge.

Dismantling Plain or corrugated steel sheeting, any gauge, thickness, including Nainital or similar pattern roof coverings complete all as spd and as directed by Engineer in Charge.

S&F Pre- painted galvalume aluminum zinc coating GI based corrugated steel sheet 0.50mm thick of an colour having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws as specified

Fair cutting in brick or solid pcc wall n exc 10 cm width or girth on exposed surfaces of brickwork such as in splays, chamfers, etc .Straight or racking cutting including rubbed finish and waste complete all as spd and as directed by Engineer in Charge.

M&L for preparation of new or previously untreated Steel surfaces of any descriptrion over 10 cm width or girth and applying two coat of synthetic enamel painting to steel surface as specified and as directed.

M&L for preparation of plaster surfaces ( including complete removal of existing treated wall surfaces ) finishing walls with Acrylic Smooth exterior paint of required shade : New work (Two or more coat applied @ 1.67 ltr/10 sqm over and including priming coat of exterior primer applied @ 2.20 kg/10 sqm) complete all as specified and directed.

Material & Labour for applying ( new surfaces ) Two or more coats of 100% Premium acrylic emulsion paint having VOC less than 50 gm/litre and UV resistance as per IS 15489:2004, Alkali & fungal resistance, dirt resistance exterior paint of required shade (Company Depot Tinted) with silicon additives @ 1.43 litre/ 10 sqm over and including priming coat of exterior primer applied @ 0.90 litre/ 10 sqm over new surfaces.complete all as specified and directed.

Providing and applying waterproofing treatment ( new prepare or existing surface )to leaking concrete roof surfaces including external wall & parapet walls by approved multi-layer elastomeric/acrylic coating system, executed through manufacturer-approved applicators, complete all as specified and as directed by Engineer-in-Charge.The waterproofing treatment shall be executed only through manufacturer approved / authorised applicator. After completion of the entire work, water tightness test / ponding test shall be carried out for minimum 48 hours to confirm satisfactory performance of the waterproofing system before final acceptance. The following manufactures specifications shall be strictly followed. For any items not explicitly covered herein, the relevant manufacturer’s specifications shall apply in completely. Waterproofing System (Concrete Roofs & Parapet Walls) Common Requirements: Complete removal of existing defective/loose treatment wherever required. Providing PCC levelling course with proper slope towards drainage points( Shall be paid Separte respective item ) Surface preparation by thorough cleaning using high-pressure water jet (minimum 125 bar) including removal of dust, algae, fungus, oil, grease, etc. Treatment of cracks: Up to 3 mm with fibre reinforced crack filler and above 3 mm with polymer modified cement mortar. Application of multi-coat elastomeric/acrylic waterproofing system (UV resistant, anti-fungal, anti-bacterial, non-yellowing) on roof and parapet surfaces. System to be applied by brush/roller/airless spray to achieve required thickness and uniform finish (white matt). Conducting ponding test for minimum 48 hours to ensure water tightness. Providing manufacturer’s warranty for minimum 10 years. Work to be executed only through company approved applicators as approved by Engineer-in-Charge. •Surface Preparation: Complate removal shall be appicable in respective items and PCC levelling work with proper slope shall be caaried out and Thorough cleaning with high pressure water jet (≥125 bars) or equivalent, removal of dust, algae, fungus, oil, grease, etc. Cracks to be opened and treated; up to 3 mm cracks filled with fiber reinforced crack filler, larger cracks with polymer modified cement. •Application Method: Multi coat liquid applied elastomeric waterproofing system, UV resistant, non yellowing, anti fungal, anti bacterial, suitable for cementitious surfaces. •Testing: Ponding test for minimum 2 days to ensure water tightness. •Finish: White matt finish, applied by brush/roller/airless spray gun. •Certification/Warranty: Product must be GRIHA/IGBC certified or carry manufacturer’s waterproofing warranty (minimum 10 years). •Applicator Requirement: Work shall be executed only by direct company approved applicators, as approved by GE. Option A – THERMOCOOL- SHR 5 Layer System/ultra: •Absorption coat of Nano Tech Enhanced Elastomeric Waterproofing (NEEWP) emulsion, UV resistant, min. 50% solids. •Crack sealing with NEEWP. •Two coats of NEEWP + cement mixture, elongation capacity +450%. •Two coats of SHR Coating (pure acrylic, BIS STD IS 17218:2019 compliant, pull off adhesion ≥2.8 MPa, durability tested 2000 hrs). •Coverage: 3.25 sqm/ltr/2 coats, DFT 100–120 microns. Option B – Asian Paints SmartCare Damp Proof Suprema: •Fiber reinforced elastomeric liquid applied waterproofing membrane, formulated with resilient acrylic polymer and synthetic fibers. •System capable of withstanding up to 7 bar hydrostatic pressure. •Three coats @10 litre/10 sqm: First coat: self priming (dilution 3:1 with water). oSecond coat: undiluted elastomeric waterproofing liquid. oThird coat: undiluted elastomeric waterproofing liquid. •Dry film thickness ≥200 microns. •Waterproofing warranty: 10 years to be submitted by contractor . •On tile mosaic surfaces, SmartCare Terrace Tile Primer to be used for adhesion. Applicator make /Company - / Thermacool ( Oprion A ) / Asian paints (Option B )