Repair to roof slab of Type I (10 Qtrs 640 Sqm), Type II (38 Qtrs 2660 Sqm), Type III (27 Qtrs 2025 Sqm) and Type IV (04 Qtrs 496 Sqm) to prevent seepage in OFBL estate

Amount

Repair to roof slab of Type –I (10 Qtrs. 640.00 Sqm), Type-II (38 Qtrs. 2660.00 Sqm), Type-III (27 Qtrs. 2025.00 Sqm) & Type-IV (04 Qtrs. 496.00 Sqm) to prevent seepage in OFBL

Demolition cement concrete floors (other than ground floors Unreinforced) and removing from the premises to a lead of 100mtr.

Roughening surfaces of old concrete floor by picking, sweeping, cleaning and washing down with water to remove dust, including removing tarfelt if any and brushing neat cement slurry with 3.0kg of cement per sq. metre.

M&L for cutting out cracks to V-section in existing roofs or terrancing, cleaning out, wetting, grouting with cement and sand slurry 1:3

Material & labour for rendering 15mm thick on fair faces of brick work or concrete surfaces with 1:4 cement mortar.

Material & labour for cement concrete floor of 40mm thick, type B-0, 1:2:4 (12.5mm graded aggregate) and finishing surfaces of concrete topping even and fair(without using extra cement)

Material & labour for providing APP based Polymeric membrane roof treatment with following provisions complete all as specified and directed in accordance with manufacturer's instructions:- (a) Applying one coat of bituminous primer, polymerized primer oil based coat, evenly @ 0.3 Kg/Sqm as priming coat to the prepared surfaces, till the surfaces is properly impregnated and the solvent oil in the based primer evaporated completely. (b) Applying APP based pre-fabricated with non-woven polyester reinforced membrane stabilised with fibre glass strands, not less than 3mm thick, with 100mm side overlap and 150mm end overlap and not less than 3.0 Kg/Sqm by torch application method. Make will be approved by EIC during execution of work.

Material & labour for applying one coat of of heat resisting paint over polymeric membrane exposed to sun light.

Material & labour for, mixing liquid Integral waterproofing compound as per manufacturer specification. Make will be approved by EIC during execution of work.

Taking down 20 mm dia existing GI tube and refixing with all fittings and re-fixed complete to walls/floor/ceiling etc.

Cutting out cracks to V- section in existing roofs or terracing,cleaning out and filling solidly with a hot mixture of bitumen and clean dry sand 1:1 (by weight)

Material & labour, for wire brushing and cleaning topsurface of tiles, lime terracing or cement concrete, including flashings and junction of parapets, etc., and surface painting, with a layer of blown grade bitumen of any penetration applied hot @ 1.7 kg per sq. m, blinded with grit or pea size gravel @ 0.006 cu.m per sq.m, and lightly tampered (area of flashings, etc., shall be added to the roof area)

RAJESH KUMAR PATRA