CERTAIN ROOF REPAIRS FOR MH ASHA SCHOOL KSA AND OTM ACCN OF JAGADHARI ROAD IN C1 SECTOR AND ADJOINING AREA OF AGE B R II (SOUTH) UNDER GE (SOUTH) AMBALA CANTT

Dismantling of brick or terracing tiles of single layers on roofs including cleaning of bricks/tiles and removal of unusable bricks/tiles and removal from site, complete all as specified and directed by Engineer-in-Charge.

Matrerial and labour for cutting and uprooting of grass/vegetation over roof surfaces and roughning old brick tile/concrete surfaces by picking, sweeping clean with wire brusing and washing down with water to remove dust etc, including flushing & filling damaged/open joints junction of parapets in CM 1:3 complete all as specified and directed.

Matrerial and labour for cutting out crack to V-section in existing roof or tarracing upto 25 mm depth cleaning out, wetting and grouting with cement and sand slurry 1:3 complete all specified and directed.

Demolition of mud roof any thickness (whether full thickness removed or part thereof ) including plastering & leaping complete all as specified and directed.

Matrerial and labour for wire brushing and cleaning the top surfaces of tiles, lime terracing or cement concrete, roof surfaces etc. with water including flashings and junction of parapets etc. complete all as specified and directed.

Matrerial and labour for plain cement concrete 1:2:4 type B-1 (using 20mm mechanically graded crushed stone aggregate) as in padding to roof to maintain the required slope and finished the surface even and smooth without using extra cement including weathering, slightly rounded or chamfered angles and throating with and including using necessary use and waste of formwork for fair finished surface complete all as specified and directed.

Matrerial and labour for 10mm thick plastering in Cement Mortar (1:3) on concrete roof surfaces with water proofing compound @ 3% by weight of cement and finishing the surface even and fair without using extra cement all as specified and directed. NOTE: - WPC shall be measured and paid separately.

Supply only liquid water proofing compound for external surfaces @ 200ml for 50 Kg bag of cement complete all as specified and directed.

Material and labour for APP polymeric water proofing treatement to roof using membrane minimum 3 mm thick and weighting not less than 3.6 kg/sqm , black finish reinforced with non-woven polyster matt (Weight not less than 150 gms/Sqm) with thermo fusible finish laid by force application after applying compatible bitumen primer at the rate of 0.40 Ltr per Sqm, by the same membrane manufacturer of density 0.87 to 0.89 kg/ltr at 25' C temprature and viscosity 70-160 cps over the primer coat, torching over laps with a propane or butane gas torch with a over lap of 100 mm at the side and 150 mm at the ends and sealing including a tack coat of hot blown bitumen 85/25 @ 1.2 Kg/Sqm below APP complete all as specified and directed. NOTES: - (i) The water proofing treatment shall be got carried out by the manufacturer or their authorised applicators duly approved by GE in writing. (ii) 5% amount of the total amount of water proofing treatment shall be retained as a guarantee and shall be released after 10 years. However contractor may deposit the FDR of same amount in favour of GE. If contractor fail to rectify the defect pointed out during this period in writing, the defect shall be got rectified at contractor' risk and cost and the payment shall be made from the amount kept reserved or by encashing the FDR deposited by the contractor as guarantee. Contractor's quoted rate for this item shall deemed to be inclusive of this aspect.

Material and labour for a coat of heat resisting painting to Surfaces of any description wood, steel, iron, concrete, brick, stone, APP surface, etc., exceeding 10cm in width or girth incl preparation of APP surfaces complete all as specified and directed.