CERTAIN REPAIRS FOR LEAKAGE, SEEPAGE, ROOF TREATMENT AND STRUCTURES AT MIL STN ABOHAR

Demolition of cement concrete ( un re-inforced) of any description in roofs, floors(other than ground floors), beams, staircases, landing, chajjas and similar suspended work all as specified.

Demolition/taking out of mud from roofs, any thickness, including removing / cutting uprooting grass,vegetations and roots of small plants and removing old roof treatment etc on roof and surrounding/parapet wall etc, including removing rubbish material from building and thrown out of the defence land complete all as specified and as directed by Engineer-in-Charge

Material and labour for cleaning of top roof surface by wire brushing, removing all dust, loose particle of concrete and washing with water and apply cement concrete flooring type B0 1:2:4 using 12.5 mm graded aggregate on roof slab all as specified and directed by Engineer-in Charge.

M & L PCC 1:2:4, type B-1 , using 20mm graded stone aggregate as in kerbs or mud stops, rounded or chamfered on edges and similar work all as specified and as directed and as directed by the Engineer-in-Charge.

M & L rendering/screed 15mm thick water proofing plaster in CM 1:3 on roof slab including mixing of liquid WPC in mortar @ 200 ml per bag of cement of 50kg and finished even and smooth without using extra cement complete all as specified and as directed by the Engineer-in-Charge. Note :- WPC shall be measured & paid separately as Supply only under relevant item of BOQ).

OVERLAY- PU BASED ELASTOMERIC LIQUIED MEMBRANE SYSTEM FOR EXPOSED ROOF : Providing and applying polyurethane liquid roof waterproofing with improved water ponding capability, elastomeric high build liquid membrane for concrete roofs for exterior wall and exposed surface with solid content not less than 80% and solar reflective index not less than 106 as per (ASTM E1980-19)/tear strength ~20 N/mm (Free film, 14 days, +30 degree C) (ASTM D624) and tensile strength >= 2 N/mm2 (ASTM D4541), elongation 350 to 400% as per ASTM D412 and crack bridging ability upto 2mm. (a) After proper surface preparation, Apply one coat of Primer for PU coating as per manufacturers specification. (b) Apply 1st coat of ShaliUrethane® BTD (white) @ 650 gm / m²(minimum) or equivalent by brush / roller while prime surface is tacky, Spread waterproofing reinforced Glass Fiber mash of 45 GSM with overlaps of 50 mm in both directions when the surface is still tacky. Allow 1st coat to dry. (c ) Apply 2nd & 3rd coat of ShaliUrethane® BTD (white) @ 650 gm / m² (minimum) or equivalent by brush/roller. Make : Fosroc/Sika/Choksey/Bostik/STP/ Asian Paints/Berger Paints Note :- (i) The Minimum dry film thickness (DFT) of roof treatment shall be 1.5mm if any shortfall in thickness of above treatment the same shall be achieved by additional coat. (ii) The procurement of material and execution of the work of water proofing treatment shall be carried out by authorised applicator approved by GE. (iii) The manufacturer/authorised applicator shall give a warranty for the performance & durability for 10 years.

M & L Cool roof tiles 300 x 300 x 10 mm white vitrified water absorption < 0.5% SRI >90 (ASTME 1980, EN673 and En 411) BEPL (Building energy perfoance laboratory ) certified laid over screed bed or bedding layer of mortar 15 mm thick CM (1:4) all as Specified and directed by Engineer - in - Charge.

Demolition of cement concrete ( un re-inforced) of any description in ground floor and pavings Nexc15 cm thickness (below or above GL).

M&L for Water proofing treatment to RCC sunken slab (not exceeding 45cm depth of sunken) as specified below and as directed by Engineer-in-Charge. :- (a) applying 15 mm plaster in CM 1:3 with WPC on raised verticle surface/floor (b) Cleaning the surface with wire brush/coir brush, removing lose material like dust particles, dirt etc. (c) Creating fillet coving of 50x50 mm with polymer modified mortar on the junction of slab and walls (d) Apply first coat of two component modified polymer coating on the horizontal and verticle surface (e) Provision of glass fiber mesh of 2 x 2 mm immediately on above coating (f) Apply second coat of two component modified polymer coating after 72 hrs (g) Cement concrete 1:5:10 over the coating as per requirment (h) Joining the saintary pipes with the water proofing tape having bridging ability of more than 1.5 mm (j) Filling the gap between the wall opening and saintary pipe with non shrink cementatious grout complete as specified. Manufacturer. Make:- Dr. Fixit/Fosroc/STP Note : (i) The treatment shall be carried out as per the manufacturers instructions and as directed by the Engineer in charge. (ii) PCC filling under sunken area will be measured & paid separately

M & L PCC (1:5:10) using 40mm graded burnt bricks aggregate as in foundation filling & mass concrete or as in sunken floor complete all as specified & directed by Engineer-in-Charge.