Terrace water proofing and allied works at Kendriya Vidyalaya No.2, Delhi Cantt, New Delhi

S.No. Description of Item Qty Unit Rate (Rs.) Amount (Rs.) DSR Reference

A. DISMANTLING & REMOVAL OF EXISTING WATERPROOFING

A.1 Demolishing brick tile covering in terracing including stacking of serviceable material and DSR 15.26

disposal of unserviceable material within 50 metres lead

A.2 Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by

mechanical means, including loading, transporting, unloading to approved municipal dumping 384.92 cum 263.95 1,01,599.63 (Sub-head 15)

ground, beyond 50m initial lead, for all leads including all lifts involved.

A.3 Surface cleaning of RCC slab by mechanical wire brushing / grinding to remove all loose

particles, laitance and contaminants to achieve a clean bondable surface

A.4 Clearing heavy debris / dead leaves / accumulated silt from terrace surface, drainage channels

and along parapet base including disposal 5,132.24 sqm 15.00 76,983.60 Market Rate

Sub-Total (A) 10,01,537.91

B. RCC SLAB REPAIR & CRACK TREATMENT

B.1 Sealing localized cracks/joints in RCC terrace slab with polymer modified flexible sealant 1,620.00 Meter

compound including cutting grooves, cleaning, primer coat, backer rod and applying sealant,

finished flush with surrounding surface. 350.00 5,67,000.00 MR

B.2 Provisional sum for unforeseen structural repairs as directed by Engineer-in-Charge 1.00 LS

Sub-Total (B) 7,67,000.00

C. EXPANSION JOINT TREATMENT

Sealing expansion joints with polymer modified flexible sealant compound including cutting

grooves to uniform width (20-25mm) and depth (25-30mm), cleaning joint faces, applying

C.1 primer coat, inserting polyethylene backer rod and applying polysulphide /polyurethane sealant 160.00 m 547.70 87,632.00 MR

(conforming to IS:11433), finishing off flush( includes cutting, cleaning, primer, backer rod &

Providing and fixing 150 mm wide aluminium expansion joint cover plate made from 18 SWG

aluminium sheet, anodised or powder coated, over sealed expansion joint, complete with

C.2 neoprene gasket and stainless steel countersunk screws fixed on both sides of the joint, 160.00 m 850.00 1,36,000.00 MR

including drilling holes, fixing with suitable fasteners and ensuring free movement of the joint,

complete as directed by Engineer-in-Charge.

Extra layer APP membrane strip (300mm wide) over all expansion joint lines on terrace after

joint treatment, torch-applied with 150mm overlap on each side

Sub-Total (C) 2,52,432.00

Digitally signed by AMIT

S.No. Description of Item Qty Unit Rate (Rs.) Amount (Rs.) DSR Reference

D. PARAPET REPAIR & TREATMENT

D.1 Dismantling old plaster or skirting, raking out joints and cleaning the surface for plaster

including disposal of rubbish to the dumping ground within 50 metres lead — parapet

inner/outer face for the damaged area. 648.00 sqm 54.65 35,413.20 (Sub-head 15)

Sealing structural cracks in parapet masonry with polymer modified flexible sealant compound

including cutting grooves, cleaning, primer coat, backup rod and applying sealant

D.4 15 mm cement plaster on rough side of single or half brick wall finished with a floating coat of

neat cement of mix 1:4 (1 cement: 4 coarse sand) on parapet inner/outer face — replastering DSR 13.5.1

damaged portions 648.00 sqm 411.75 2,66,814.00 (Sub-head 13)

D.6 Providing and laying damp-proof course 50 mm thick with cement

concrete 1:2:4 (1 cement : 2 coarse sand (zone-III) derived from natural sources : 4 graded

stone aggregate 20 mm nominal size derived from natural sources). 324.00 sqm 495.75 1,60,623.00 4.11

D.7 Finishing walls with water proofing cement paint of required shade — new work (two or more

coats applied @ 3.84 kg/10 sqm) on repaired parapet outer face DSR 13.44.1

Sub-Total (D) 5,88,951.00

E. SLOPE FORMATION & SURFACE PREPARATION

E.1 Providing and laying in situ cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone

aggregate 20mm nominal size) for slope / grading on terraces including finishing etc. complete DSR 22.14.1

in all respects. 205.29 cum 8,042.30 16,51,003.77 (Sub-head 22)

E.2 Providing & making 50x50mm cement mortar fillet (1:3) at parapet-slab junctions for cant/cove

Sub-Total (E) 17,42,803.77

F. APP MEMBRANE WATERPROOFING SYSTEM

Digitally signed by AMIT

S.No. Description of Item Qty Unit Rate (Rs.) Amount (Rs.) DSR Reference

F.1 Providing and laying APP (Atactic Polypropylene Polymer) modified prefabricated five layer 3

mm thick water proofing membrane, black finished reinforced with non-woven polyester matt

consisting of a coat of bitumen primer for bitumen membrane @ 0.40 litre/sqm by the same

membrane manufacture of density at 25°C, 0.87-0.89 kg/ litre and viscocity 70-160 cps. Over

the primer coat the layer of membrane shall be laid using Butane Torch and sealing all joints

etc, and preparing the surface complete. The vital physical and chemical parameters of the

membrane shall be as under : Joint strength in longitudinal and transverse direction at 23°C as

650/ 450N/ 5cm. Tear strength in longitudinal and transverse direction as 300/250N. Softening

point of membrane not less than 150°C. Cold flexibility shall be upto -2°C when tested in

accordance with ASTM, D - 5147. The laying of membrane shall be got done through the

authorised applicator of the manufacturer of membrane :

F.4 Providing and fixing aluminium counter-flashing at top of APP membrane upturn on parapet,

including cutting groove/chase in parapet, fixing the flashing, sealing the top edge with

approved sealant, and making good the surface complete as directed by Engineer-in-Charge.

F.5 Rainwater outlet / khurra detailing — two-layer APP collar with galvanized clamp ring, soldered 205.00 each

flashing and sealant

F.6 Pipe penetration detailing — APP boot/collar, two-layer flashing and sealant at all pipe 20.00 each

penetrations through membrane 2,000.00 40,000.00 MR

Sub-Total (F) 47,03,146.79

G. PROTECTIVE SCREED / FINISH OVER APP MEMBRANE

G.1 Providing and laying cement mortar 1:4 (1 cement : 4 coarse sand) as protective screed over DSR 22.14.3

waterproofing membrane on terrace, laid to required slope and finished smooth, including (Sub-head 22)

surface preparation, curing and all complete as per direction of Engineer-in-Charge.

Sub-Total (G) 31,11,293.12

H. TESTING, QUALITY CONTROL

H.1 Flood/ponding test for 48 hours on completed APP membrane before protective screed, 1.00 Job

including bunding, water filling, observation and draining (multiple bays)

Sub-Total (H) 2,50,000.00

Total cost of the works(incl. GST) 1,24,17,164.59

Digitally signed by AMIT