NIT for External Painting of NABARD Vihar, Sector 66, Mohali

Removal of dry old Paint :- Removal of existing dry or oil-bound distemper, waterproofing cement paint, or similar coatings by scraping, sandpapering, and preparing the surface to achieve a smooth finish including necessary repairs to scratches, dents, other surface imperfections, patch plastering, and putty work as required.

PMM repair work up to 20 mm on wall (upto chajja) & mumty room :- • Repairing to the existing RCC structural members (vertical or horizontal) using ready mix Polymer Modified Mortar (Fibre reinforced structural grade repair mortar) of approved brand where the thickness of repair is up to 20 mm. • Surface preparation- All loose traces of concrete or mortar, dust, grease oil, etc. must be removed. • Damaged or contaminated concrete shall be removed to obtain a keyed aggregate exposed surface. • Clean the surface using high pressure water blasting. • Clean all exposed reinforcement to a minimum grade of Sa 2 according to ISO 8501-1 / ISO 2944-4. • Ensure all visible portions of the reinforcing bar is clean. Where reinforcing bars are corroded, cut back the concrete around the reinforcing bars, Grit blast to remove corrosion products from around reinforcing bars and coat with approved epoxy coating for corrosion protection as recommended by the Engineer. • Replace the affected part of rebar if the diameter after grit blasting is found reduced by more than 20% of the original diameter on the advice of the engineer. • Bond Coat- Providing & applying One coat of structural grade epoxy bond coat by brush conforming to ASTM-C-882-87 to the prepared concrete surface to be repaired / strengthened and repairing with PMM shall be done when the surface is tacky. • Mixing - Only full bags are mixed. Damaged or opened bags should not be used. • Mix the ready-mix Polymer Modified Mortar in a forced action pan mixer, or with a helical paddle attached to a low speed (300-600rpm) mixer for 3 minutes until a lump free, thixotropic consistency is achieved. • Only use clean water. Mixing water needed: 3.75 to 4.25 liters per 25kg bag or as recommended by the Manufacturer of Polymer Modified Mortar. • Allow the mortar to rest for 2 - 3 minutes and then remix briefly before pouring into formwork. If temperature more than 40°C then use chilled water for mixing. • Mortar application - The minimum temperatures must be maintained during application and for at least 24 hours thereafter for optimum curing of the product. • The prepared substrate should be presoaked, preferably for 24 hours, but at least 2 hours before applying Polymer Modified Mortar. The surface must be saturated surface dry, but without standing water. • Polymer Modified Mortar can be spray- or hand-applied. Apply mixed product directly to the prepared damp substrate, or wet on wet onto the primed surface. Spraying the material with the necessary pressure will ensure good adhesion of the material. A thin scrape coat or contact layer before building up to the required thickness, wet on wet, will improve adhesion especially in case of hand application. Apply to the desired layer thickness upto 15 mm and level using a screeding bar, trowel or wooden board. Smoothing with a trowel or finishing by float or sponge can be done as soon as the mortar has begun to stiffen. • Protective coatings- Subsequent coatings of any ant carbonation barriers or silane impregnations should be applied if recommended by the Engineer. • Plaster- The repaired surface shall be matched to the surrounding surface by providing required thickness of plaster internal or external plaster. • Curing - Minimum 7 days curing shall be done to the newly repaired area using any suitable method.

Chicken Mesh: • Providing and fixing chicken mesh of 22 gauge, with about 30 cm width at the junction of R.C.C. members and brick work of approved quality including fixing mesh in position by necessary drilling in concrete/B.B. Masonry and or tying by binding wire etc. complete, to cover the cracks at the desired location and at all levels of building. • The contractor has to remove the existing damaged plaster for making area for fixing of chicken wire mesh as directed.

Exterior Paint:- (Blocks A, B and C) • Providing, applying & finishing walls with Acrylic Smooth Exterior Paint of Yellow/Orange or other shade , applied in two or more coats over the existing paint surface at a coverage area of 1.75 liters per 10 sqm over and including priming coat of exterior primer applied @ 0.90 litre/10 sqm . • The work includes ensuring proper adhesion as per manufacturer specifications to achieve a uniform and durable finish with the coat of requisite/recommended primer. Complete in all respects. Approved Make: Asian, Berger, Nerolac or equivalent

Providing and applying Paint at Stilt and passage areas:- • Distempering with first quality acrylic distemper (ready-mixed), having VOC (Volatile Organic Compound ) content less than 50 grams/ litre of approved brand and manufacture, including two or more coats wherever required, from an approved manufacturer, in the white shade and color with a coverage area of 1.75 liters per 10 sqm. • The work includes application as per manufacturer's specifications to ensure an even and durable finish. Complete in all respects. Approved Make: Asian, Berger, Nerolac or equivalent

Removal of dry old Wooden Paint :- • Removing dry or oil bound distemper, water proofing paint or similar coatings by scrapping, sand papering and preparing the surface smooth including necessary repairs to scratch, filling cracks and other surface imperfections etc. Complete in all respects.

Painting woodwork:- • Providing and applying Enamel paint on woodwork with Deluxe Multi-Surface Paint of the required shade, from an approved brand and manufacturer, applied in two or more coats at a coverage area of 0.90 liters per 10 sqm over an under coat of primer applied @0.75 ltr/10 sqm to achieve a smooth, uniform, and durable finish. • The work includes surface preparation, sanding, priming, and ensuring proper adhesion as per manufacturer specifications. Complete in all respects. Approved Make: Asian, Berger, Nerolac or equivalent

Iron Steel Paint:- • Providing and applying both side Painting iron steel work with Deluxe Multi-Surface Paint of the required shade, from an approved brand and manufacturer, applied in two or more coats at a coverage area of 0.90 liters per 10 sqm over an under coat of primer applied @ 0.80 ltr/10 sqm of approved brand and manufacture to achieve a smooth, uniform, and durable finish. • The work includes surface preparation, removal of rust/old paint (if applicable), priming, and ensuring proper adhesion as per manufacturer specifications. Complete in all respects. • Quantity measurement of painted iron and steel surfaces will be done based on the painted area on one side only. Approved Make: Asian, Berger, Nerolac or equivalent

Plastering & Repair (Boundary wall):- • Providing and applying cement plaster of thickness 12 mm upto 20 mm walls including removal of old plaster surface and plastering the wall with cement mortar (1:4 mix of 1 part cement and 4 parts coarse sand). • The work includes proper finishing and ensuring smooth surface alignment, Complete in all respects.