Special repair works Waterproofing works and other related civil works in Academic Hostel and residential zone for the year 2026 27 and 2027 28

SUB HEAD A - ACADEMIC ZONE

Supplying and spraying Aliphatic Polyurethane (PU) membrane (Moist cured) over the existing exposed terrace after completely replacing the existing pressed clay tiles, repairing the Khura and Gola etc., complete. The scope of work includes the following sequence of operations. (a) Removing the existing tiles with any type of overlay, bed mortar and preparing the surface to receive the new waterproofing layer. The rate including transporting and stacking the debris at designated location on ground within 50 metres lead and lift up to 5th floor level. (b) Resurfacing of the substrate with SBR Latex polymer modified cement mortar (Cement: sand ratio : 1:3 with a Water (Mixed with SBR Latex) cement ratio of 0.4-0.45), with a minimum thickness of 20 mm, to get a levelled surface. The dosage of SBR Latex will be 4 kgs per bag of cement. The rate should be inclusive of bonding coat with cement and latex mix of ratio 1:1 over the cleaned surface before application of mortar and including providing grooves to form grid of plan area not more than 4 Sqm. (c) Providing and laying pressed clay tile (clay tile of 18mm thick ) including bed mortar, as per approved pattern on roofs jointed with cement mortar 1:4 (1 cement : 4 coarse sand) mixed with 2% integral water proofing compound, laid over a bed of 20 mm thick cement mortar 1:4 (1 cement : 4 coarse sand) and finish neatly as required. (d) Raking out tile joints in cement mortar and preparing the surface and pointing with cement mortar of CM 1:3 (1 cement : 3 fine sand) admixed with 3 Kg of SBR latex per 50 kg of cement.

(e) Repairs to rain water mouth / Khura opening the existing damaged rain water mouth, dismantling the existing weathering course, removing the pipe and cleaning the surface etc. complete. the diameter of the opening should be more than 25cm around the rain water pipe to be fixed. The new rain water pipe to be fixed to the opening after installing swellable acrylic based PU water bar around the pipe, fixing the rain water pipe to the opening made and filling the gap between the rain water pipe and the opening with non shrink grout without any gap, applying a layer of cementitious water proof coating over the rainwater floor mouth (The rate is also inclusive of applying a layer of cementitious coating Cement : SBR 1:1 ratio over the wall floor junction before making khura) and finishing the surface neatly. Rate inclusive of providing adequate diameter and length of PVC pipe to connect to existing rainwater pipe. (f) Providing gola / coving 75x75 mm in cement concrete 1:2:4 admixed with 4 Ltr of SBR latex for 50 kg of cement (1 cement : 2 coarse sand : 4 stone aggregate 10 mm and down gauge), including finishing with cement mortar 1:3 admixed with 4 Ltr of SBR with 50 kg of cement (1 cement : 3 fine sand) as per standard design. The rate also inclusive of applying a layer of cementitious coating Cement : SBR 1:1 ratio over the wall floor junction before applying coving.

(g) Crack repair to parapet wall :-Cutting of crack mouth, as ‘V’ groove of 10 mm x 10 mm, & sealing with polyurethane sealant as per the manufacturers' specification and methodology. (h) Supplying and spraying single component Polyurethane (PU) water proofing coating which cures with the atmosphere humidity. The layer should produce a highly elastic membrane with strong adhesion to many types of surfaces. The product should be based on pure elastomeric hydrophobic polyurethane resin plus special inorganic fillers, to produce excellent mechanical, chemical, thermal, UV and natural element resistance properties. The product should be applied with airless spraying in two or more coats with minimum PU consumption as per manufacture specification. The rate is inclusive of necessary surface preparation to receive the waterproofing coating. The number of coat, coverage, thickness, priming coat, reinforcement etc., as per manufacture specification.

Supplying and spraying Polyurethane (PU) membrane (Moist cured) over the existing exposed terrace after replacing the damaged pressed clay tile wherever required (less than 10% of the overall area), repairing the Khura etc., complete. The scope of work includes the following sequence of operations. (a) Removing the existing damaged pressed clay tile including bed mortar or any other type of overlay and laying pressed clay tile ( tile of 18mm thick ) over the terrace as per approved pattern 18 mm nominal thickness of approved size . The tile shall be jointed with cement mortar 1:4 (1 cement : 4 coarse sand) mixed with 2% integral water proofing compound, laid over a bed of 20 mm thick cement mortar 1:4 (1 cement : 4 coarse sand) and finished neat complete. (The cost for this item will be paid separately in this schedule). (b) Raking out joints in cement mortar and preparing the surface and pointing with cement mortar of CM 1:3 (1 cement : 3 fine sand) admixed with 3 Kg of SBR latex per 50 kg of cement.

(c) Repairs to rain water mouth / Khura opening the existing damaged rain water mouth, dismantling the existing weathering course, removing the pipe and cleaning the surface etc. complete. the diameter of the opening should be more than 25cm around the rain water pipe to be fixed. The new rain water pipe to be fixed to the opening after installing swellable acrylic based PU water bar around the pipe, fixing the rain water pipe to the opening made and filling the gap between the rain water pipe and the opening with non shrink grout without any gap, applying a layer of cementitious water proof coating over the rainwater floor mouth (The rate is also inclusive of applying a layer of cementitious coating Cement : SBR 1:1 ratio over the wall floor junction before making khura) and finishing the surface neatly. Rate inclusive of providing adequate diameter and length of PVC pipe to connect to existing rainwater pipe. (d) Crack repair to parapet wall :-Cutting of crack mouth, as ‘V’ groove of 10 mm x 10 mm, & sealing with polyurethane sealant as per the manufacturers' specification and methodology.

(e) Supplying and spraying single component Polyurethane (PU) water proofing coating which cures with the atmosphere humidity. The layer should produce a highly elastic membrane with strong adhesion to many types of surfaces. The product should be based on pure elastomeric hydrophobic polyurethane resin plus special inorganic fillers, to produce excellent mechanical, chemical, thermal, UV and natural element resistance properties. The product should be applied with airless spraying in two or more coats with minimum PU consumption as per manufacturer specification. The rate is inclusive of necessary surface preparation to receive the waterproofing coating. The number of coat, coverage, thickness, priming coat, reinforcement etc., as per manufacture specification.

Supplying and applying Aliphatic Polyurethane (PU) membrane directly over the existing exposed terrace /surface after thorough cleaning including removal of any type of existing overlay, bed mortar and preparing the surface to receive the new waterproofing layer . (a) Supplying and spraying single component Polyurethane (PU) water proofing coating which cures with the atmosphere humidity. The layer should produce a highly elastic membrane with strong adhesion to many types of surfaces. The product should be based on pure elastomeric hydrophobic polyurethane resin plus special inorganic fillers, to produce excellent mechanical, chemical, thermal, UV and natural element resistance properties. The product should be applied with airless spraying in two or more coats with minimum PU consumption as per manufacturers specification. The rate is inclusive of necessary surface preparation to receive the waterproofing coating. The number of coat, coverage, thickness, priming coat, reinforcement etc., as per manufacture specification.

Supplying and applying of Aliphatic elastomeric polyurethane-polyurea hybrid waterproofing membrane directly over the existing exposed terrace /surface after thorough cleaning including removal of any type of existing overlay, bed mortar and preparing the surface to receive the new waterproofing layer . (a) Supplying and spraying single / two componentelastomeric polyurethane-polyurea hybrid waterproofing membrane which cures with the atmosphere humidity. The layer should produce a highly elastic membrane with strong adhesion to many types of surfaces. The product should be based on pure elastomeric hydrophobic polyurethane resin plus special inorganic fillers, to produce excellent mechanical, chemical, thermal, UV and natural element resistance properties. The product should be applied with airless spraying in two or more coats with minimum PU consumption as per manufacturers specification. The rate is inclusive of necessary surface preparation to receive the waterproofing coating. The number of coat, coverage, thickness, priming coat, reinforcement etc., as per manufacture specification.

Repairs to Water tank -Supplying and applying solvent free food grade PU coating for water tank floors and wall of thixotropic coating, based on high quality elastomeric polyurethane resins. The product can be roller applied with two or more coats over the primer coat with consumptions and application as per the manufacturer specification. The number of coat, coverage, thickness, priming coat, reinforcement etc., as per manufacture specification.