REPAIRS AND MAINTENANCE TO EXTERNAL WALLS OF BUILDINGS WITH WATER PROOFING MATERIAL AND CONNECTED WORKS AT SITE A3 OF NAVAL BASE KARWAR

Taking down cement plaster on brick or concrete surfaces of walls/ceilings and the like, including raking out joints, hacking for key, scrubbing down with water etc., of any description, including removal of rubbish outside MoD land, complete all as specified and directed. Note: The rate quoted by the Contractor shall be deemed to include necessary scaffolding, staging and formwork/arrangements.

M&L for surface preparation and application of waterproof exterior coating as follows: cleaning new/existing plastered surfaces till free from dust, grease, loose/flaking paint and other foreign matter; removal of unstable paint by high-pressure wash or scraper, as appropriate; removal of algae/fungus by high-pressure wash or coir brush and treatment with fungicidal solution; filling surface cracks up to 5 mm width with Dr. Fixit Crack-X paste or equivalent, and cracks exceeding 5 mm/separation gaps with Dr. Fixit Pidicrete URP modified mortar or equivalent, all as specified. Applying Dr. Fixit Raincoat Neo or equivalent directly from container after stirring well; applying self-priming/first coat by brush/roller on vertical/horizontal wall surface in SSD condition, diluted in the ratio of 1 litre coating with 100 ml clean potable water and allowing to dry for 4–6 hours; applying second coat undiluted as waterproof top coat of approved shade by roller/brush with coverage 3.7–4.1 sqm/litre to achieve DFT of 100–110 microns, allowing 4–6 hours drying time. Additional coat shall be applied, if required, on horizontal surfaces such as window tops, ledges, parapet walls etc., and the coating shall be allowed to air cure for 7 days, including necessary scaffolding and safety measures, complete all as specified and directed. Note: Exterior emulsion paint, wherever specified, shall be applied by mechanical sprayer through approved applicator in approved shade.

M&L for writing letters or figures in black letters on white base, in Block/Roman/Italic/Indian letters, not exceeding 30 cm high, including stops, commas, short lines, dashes, hyphens and brackets, including necessary scaffolding and safety measures, complete all as specified and directed.

M&L for cutting down plants/trees up to 10 cm girth and applying Roundup/Glypocet or equivalent approved herbicide to roots at roof tops/sides, external walls of buildings, chajjas, wall junctions, and at junctions of rain water/CI waste water pipes, including taking out possible quantities of roots entered into wall/slab surfaces and making good the surfaces, including repairing affected GI/CI/AC/PVC pipe joints after application of herbicide. Making good shall be carried out to match adjoining surfaces using PCC (1:2:4) Type B1 (12.5mm graded aggregate) or cement mortar 1:2, including necessary scaffolding/staging up to height of 7.00 m from ground level, complete all as specified and directed.

M&L for rendering 15 mm thick in CM (1:4) on fair faces of concrete surfaces, finished even and smooth without using extra cement and mixed with waterproofing compound @ 3% by weight of cement, complete all as specified and directed.

Supply only integral waterproofing compound, complete all as specified and directed.

M&L for rendering 10 mm thick in cement mortar 1:4 on fair faces of concrete/brickwork surfaces, finished fair and even without using extra cement, complete all as specified and directed.

M&L for finishing walls with exterior emulsion weatherproof paint of required shade, new work, two or more coats applied @ 1.67 litre/10 sqm over by using mechanical spray and including priming coat of exterior primer applied @ 2.20 kg/10 sqm, including necessary scaffolding and safety measures in G+2 buildings, complete all as specified and directed.

Dismantling of cast iron, 100 mm dia drain pipes from walls/ trenches, including all fittings & accessories all as specified and directed.

M&L for PVC (SWR) pipe, single socketed, in any length, with rubber ring joints, fixed to wall, 110 mm bore, complete all as specified and directed.