REPAIRS TO ROOF TREATMENT AND LACQUER COATING IN ZONE C AREA AT NDA KHADAKWASLA

Preparatory Works -Thorough cleaning work, removal of loose screed, repairing of the damaged portions. Making slope corrections and damaged portions near rain water outlet. Filling the annular space between concrete surface and rain water PVC pipe using non shrink grout after preparing the surface using sand paper and application of Nitobond SBR Latex as a priming coat on the area. Mixing and pouring Conbextra GP2, high strength grout with clean and cool water at ratio of 0.16 on the prepared surface to make the bore packing water tight. The rate shall include necessay materials, tools and application procedure as per manufacturer's specification.

Repair of Roof Terrace Stone Masonry Joints-Preparing the surface, removal of loose particles, damaged portions and after jet wash the complete area. Opening the damaged joints, grinding those marked joints, applyhing bonding agent Nitobond AR, further filling it with polymer repair dual shriknage repair mortar Renderoc SP40. Providing and laying Renderoc SP 40- shrinkage controlled polymer modified single component, alkaline resistant fibre reinforced, thixotropic, cementitious patch repair mortar supplied in 25 kg moisture resistant bag when mixed with clean water at w:p ratio 0.18, achieves compressive strength (BS 1881 Pt.116) -> 20 Mpa at 1 day & > 45 Mpa at 28 days, Tensile Strength(BS 6319 Pt.7) > 2.5 Mpa at 28 Days, Flexural Strength(BS 6319 Pt.3)>7 Mpa at 28 days, Drying shrinkage to ASTM C 157-93, 28 days < 1000 microstrain capable of applying upto 50 mm thickness in single layer. Renderoc SP 40 shall have CE (CE 29842) marking and compliance according to Construction Products Directive 89/106/EEC (CPD). and application procedure as per manufacturer's specification

Water Repellent Coating- Providing and application of protection system to external stone/concrete surface after proper surface preparation and cleaning to remove any laitance, algae, fungal,foreign materials using suitable repairing method followed by uniform application of Nitocote SN522- Colourless, ready to use, silicone resin solution using suitable brushing or spraying at recommended coverage etc. complete including all tools and tackles as per manufacturers specification and as directed by EIC. Product shall be complies with BS 6477-92 Class A and Class B as silicone-based water repellent.

Chajja & Honeycoming Treatment-It is recommended to repair damaged chajja & honeycomb patches using ready to use repair mortar. Recommended Product: Renderoc SP 40 - Polymer modified single component, alkaline resistant fibre reinforced, thixotropic, and cementitious patch repair mortar. Renderoc SP 40 achieves compressive strength (BS 1881 Pt.116) -> 20 Mpa at 1 day & > 45 Mpa at 28 days, Tensile Strength (BS 6319 Pt.7) > 2.5 Mpa at 28 Days, Flexural Strength (BS 6319 Pt.3)>7 Mpa at 28 days, Drying shrinkage to ASTM C 157-93, 28 days < 1000 microstrain. Remove the loose particles, latiances and contamination if any. Mark the area to be patch repaired, Renderoc SP 40 to be mixed with recommended quantity of water and apply to prepare surface and finishing the same with trowel carefully compacting the same around the rebars and finishing to bring it in line with existing concrete surface etc., where the thickness of application is less than 50 mm in patches as per specification after applying bonding coat. As Renderoc SP 40 is cement based material it should be cured immediately. Price considering thickness of repair 10mm. Curing to be executed by suitable curing compound.

M&L for removing of existing plaster surface upto base level & cleaning the surface of roof/wall with wire brush with water throroughly to remove all dust/dirt and loose particles and applying 2 coats of asian smart care damp proof 2K on an interval of 4 to 6 hrs (1st & 2nd coat should be perpendicular direction) as per manufacture instruction, after plaster the surface and apply painting to match the existing surface complete all as specified and approved by Accepting Officer

M&L for preparing old plastered/conrete surface of roof/wall with wire brush with water thoroughly to remove all dust/dirt and loose particles and applying 3 coats of Dr fixit New coat/Asian paint damp proof on roof/wall surfaces including crack seal sealent if required at crack portion of roof/wall allapplication as per manufacturer instruction and including warranty certificate provided by applicator/company.

Taking down of existing tarfelt and cement plaster of any description and thickness on roof top including flashing and junction of parapet and cleaning existing roof top surface by brooming , wire brushing including removing the debrish out complete all as specified and directed

Demolition Concrete of any description and in any position not otherwise specifically provided for

Removing building materials etc (other than spoil) to a distance exc 1.00 KM and not exc 5.00 KM incl loading, unloading and stacking etc.

M&L for cement concrete Type B0 (1:2:4) (12.5mm graded stone aggregate ) as in roof padding complete all as specified