Repair to Roof by Dismantling Damaged Tile Terracing and Providing New Water Proofing Treatment in Delhi Vidhan Sabha.)

Neat cement punning.

Dismantling tile work including existing Atactic Polypropylene polymeric membrance/sheet laid in cement mortar including stacking material with 50 mtr lead. For thickness of tiles 10 mm to 25 mm

Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by Engineer-in-charge, beyond 50 m initial lead, for all leads including all lifts involved.

Modified Estimate Cost after correction on DSR items on a/c of GST@ 0.973

Deduct Cost index @-0.09%

Surface Preparation - The concrete Surface is to be made free from all depression/undulations, dust dirt, laitance and all the adhesion inhibiting material. Depressions, holes, and any undulations on the entire surface if any must be treated/filled with high-strength polymer modified mortar/ micro concrete and the surface should be fully repaired and levelled.

Waterproof Coating – After the entire surface preparation has been done, pre wetting of the entire concrete surface and providing and application of the 1st coat of Velosit WP 124 of VELOSIT or 2CWS of C.P.I (Concrete Product India) or equivalent with a mason’s brush. After the 1st coat has sufficiently dried the 2nd coat of Velosit WP 124 of VELOSIT or 2CWS of C.P.I (Concrete Product India) or equivalent can be applied. The total consumption of the product should not be less than 3.50kg/sqmt in 2 coats. The product should have a tensile elongation of 60%, tensile strength of 2Mpa, adhesion strength of 2Mpa, crack bridging capacity of 2.4mm as per ASTM C- 836 and water impermeability of 5 bars on positive and 1.5 bar on negative side as per EN 12390 – 8 complete as per manufacturer’s specifications and direction of Engineer-in-Charge complete. For roof/slab/floor (Two coats @3.50 kg/sqm)

Providing and fixing Joint Sealing Tape of approved make of Concrete Products India (CPI) or equivalent (Joint Sealing Tape made up of High end polyethylene with upper and lower surface heat laminated of width 200 mm, weight of Joint Sealing Tape per metre of width 200 mm should be 0.050 kg/m with variation + 5% having tensile elongation 300% and water impermeability 5 bars from the positive side as per EN 12390-8) for water proofing on the Joints of Toilets, Rain water outlets, Khurras, pipe recesses/penetrations in kitchens and bathrooms etc. complete as per direction of Engineer-in-charge.