SPL REPAIR TO ROOF TREATMENT OF CERTAIN CRITICAL BLDGS AT AF STN CHANDIGARH UNDER GE (AF) MC CHANDIGARH

Dismantling brick tiles or terracing tiles, single layer on roof and removal of unserviceable brick tiles / brick bats of rubbish outside defence land upto a distance exc 1.5 kilometer but n.exc 5 kilometer, complete all as specified and directed.

Taking down existing bitumen felt including cement mortar bedding padding and cleaning the surface and removal of all rubbish outside defence land upto a distance exc 1.5 Kilometer but n.exc 5 Kilometer, complete all as specified and directed.

Demolition of mud in roof, any thickness, including plastering and leaping (whether full thickness removed or nly a part thereof) and removal of all rubbish outside defence land upto a distance exc 1.5 Kilometer but n.exc 5 Kilometer, complete all as specified and directed.

Material and Labour for PCC 1:2:4 type B0 (12.5 mm graded crushed stone aggregate ) as in padding on roof laid in 50mm thick average required thickness to maintain desired slope, finished even and fair without using extra cement, complete all as specified and directed. Note : 80% of the PCC will have to be poured by the RMC.

Material and labour for cement concrete (1:2:4) type B-1 using 20 mm graded crushed stone aggregate, as in roof kerb, mud stops, benching including demolition of existing PCC and removal of all rubbish outside defence land upto a distance exc 1.5 Kilometer but n.exc 5 Kilometer, complete all as specified and directed.

Material and labour for rendering 15mm thick in cement mortar (1:3) using WPC @ 200ML per 50Kg bag of cement on surfaces of roof and parapet, finished even & fair without using extra cement, complete all as specified and directed. Note:- WPC shall be measured and paid separately.

Supply only Liquid water proofing compound complete all as specified and directed.

Material and Labour for prepatration of roof top surface for roof treatmment using application of water proofing treatment by authorised appplicator complete all as specified and as directed and comprising of the following :- (a) Preparation of roof top suarface and cleaning all the dust and loose material by brush /blower /grinder including removing of vegetation /plantation from the surface and providing and single componenet elastic cold applied polyurethene modified acrylic roofing system , co- elastic technology (CET) based on modified polyurethene and fully fibre reinforced, having sun reflectivity index (SR) of 109 on top of concrete roof surfaces . (b) All cracks upto 3mm at corner joints ,channel and parapets shall treated with crack seal . (c) Applying three coats including one coat of primer of polyurethene membrane having coverage @ min 0.75 Kilogram/ Square Meter and dilution upto 10% and laying Reinforced fibre net and applying two coats of for maintaining minimum dry film thickness 1.5mm and elongation at break of free fall of approx 350% (d) The Material shall be applied with brush or roller, complete in all respect as directed. (Note: 6hrs interval between two coat shall be maintained) (e) All auxillary and accessories involved during application should be supplied by single manufaturer as part of system Notes : (i) The water proofing treatment shall be carried out by the manufcturer or their authorised applicators duly approved by GE in writting. (ii) Checking the roof slab by any method as per standard engineering practice till total elimination of leakage/ seepage/ dampness shall be removed by the method as per manufacturer instruction.

All as per item No. 8.00 here-in-before but as in chajjas.

Material and Labour for preparation of old plastered /concrete surfaces of ceiling and applying one coat of oil bound distemper, white or tinted at any height including necessary scaffolding etc complete all as specified and directed.