COMPREHENSIVE B/R MAINT WORKS AT KOTDWARA UNDER AGE(I) LANSDOWNE

Removing existing water proofing treatment what so ever exist (except concrete padding) and removing debries / rubbish material out side MoD land complete all as specified and directed.

M&L roughening surfaces of old concrete floor by picking, sweeping clean and washing down with water to remove dust etc and brushing neat cement slurry with 3.0 kg of cement per sqm complete all as specified and directed.

Demolition of cement Concrete in ground floors and pavings n exc 15 cm thickness (below or above ground level) including removal of rubbish out side MOD land complete all as specified and directed.

M&L for 25mm thick PCC 1:2:4 type B-0 (using 12.5 mm graded stone aggregate) as in padding over RCC roof and finishing cement concrete surface even and smooth without using extra cement complete all as specified and directed.

M&L for 15 mm thick screed bed or bedding layer in CM (1:4) mixed with water proofing compound (liquid type) as per manufacturer instruction on concrete roof surface finished fair and even to maintain the proper slope of roof surface etc complete all as specified and directed. Note :- WPC (liquid type) shall be measured and paid separately as supply only.

M&L of water proofing treatment to non-accessible roof slab with APP based modified polymeric membrane as per manufacturer’s instructions with following course of description below :- (a) Applying a priming coat of industrial bitumen 85/25 @ of 1.2 kg per sqm, till the surface is properly impregnated. (b) Providing APP based 5 layer polymeric membrane minimum weighing 3.0 Kg/ Sqm and minimum 3 mm thick reinforced with polyester non-woven fabric (weight not less than 150 gms/sqm) centre core, laid on primed surface by torced applications as per the manufacturer's instructions with side over lap of 100 mm and end overlap of 150 mm. All overlap joints shall be sealed thoroughly by thermo fusing both the membrane layer (torching overlap by propane or butane gas torch ) and sealing it with the help of hot trowel. The overlap joints shall be made as a monolithic layer (c) Apply two coat of solar reflective bituminous aluminium paint over a coat of aluminium red oxide over the membrane 1. The work of water proofing treatment shall be got executed through authorised applicator of the manufacturer only and 10 year company back warranty to be submitted by contractor 2. The work is required to be carried out at non-accessible roof slab . The contractor shall make arrangement of scaffolding, safety and security of workers and arrangement for approach to roof.The rates quoted shall deemed to be included for these items.)

M&L for 75 mm thick PCC (1:4:8) type D2, (using 40 mm graded stone agg) as in sub base etc finished even and rough to recive top layer complete all as specified and directed.

M&L for chequered cement concrete tiles with grey cement and pigment of size 30cmX30cmX 30mm thick, set and jointed and pointed in neat cement slurry in floor etc over and including 15mm thick screed bed in CM 1:6 including dismantling of existing tiles complete all as specified and directed

Dismantling of plain or corrugated steel sheeting, any gauge, thickness in roof coverings complete all as specified and directed.

S&F Pre-painted galvalume aluminum zinc coated GI based corrugated steel sheet 0.50mm thick of colour, as approved by AGE(I) having tensile strength of 550 Mpa, AZ-150 as in roof covering/cladding to wall, fixed with self tapping screws complete all as specified and directed.