Roof treatment work by Poly Urethane based water proofing compound at different roofs of the Institute, CSIR-CGCRI, Kolkata.

Amount

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.

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 fine sand)

15 mm cement plaster on rough side of single or half brick wall of mix : 1:6 (1 cement: 6 coarse sand)

Cement concrete flooring 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate) finished with a floating coat of neat cement, including cement slurry, but excluding the cost of nosing of steps etc. complete. 40 mm thick with 20 mm nominal size stone aggregate

Torching Application: Labour charges for torching of existing APP membranes with the help of butane torch complete with removal of entrapped water and finishing with the help of trowel to ensure continous, seamless, sound bituminous surface for the PU application.

Undercoat Application: Providing and applying a priming coat of SmartCare Epoxy Primer mixed at a ratio of 1:3 (resin:hardener) applied at a consumption of 200 gms/Sq. Mt. so that the entire surface is fully primed out and joints are protected.

Coating Application: Proving and applying one-component brush/roller/spray applied, polyurethane, waterproofing membrane with a SRI value >105 and based on pure, elastomeric, hydrophobic, polyurethane resins which forms a uniform, elastic, waterproof, aporpermeable sealing layer after application and curing forming a eamless cast in situ membrane providing high Mechanical, chemical, thermal, UV and weather resistance properties; Density : 1.44 kg/l Viscosity : 5,500 ± 500 mPa.sec (at +23o C) Elongation at break: 750 ± 50% (ASTM D 412) Tensile strength: 4.0 N /mm2 (ASTM D412) Hardness according to SHORE A: 80 ± 2 Water impermeabili ty: 5 atm (DIN 1048) Solar Reflectance (SR): (ASTM E903 -96) Infrared Emittance: (ASTM C1371 -04a ) Solar Reflectance Index (SRI): 106 (ASTM E1980 -0) Permeability to CO 2 : Sd > 50m (EN 1062 -6) Water vapor permeability: Sd=0.82m (permeable, EN ISO 7783 - 2, Class I < 5m) Adhesion: > 2.0N /mm2 (EN 1542,requirement for flexible systems without trafficking: 0.8 N/mm 2) Artificial weathering: Pass (no blistering, (EN 1062 -11, cracking or after 2000h) flaking) Providing and applying UV Resistant Solar Reflecting PU membrane Smart Care PU@ 1.5 Kg/Sq. Mt. in 2 coats to provide a seamless coating.

Taking out old damaged tarfelt from the roof, parapet etc. preparing the roof surfaces by removing all spoils, blisters, moss etc. from the working site and disposal of the same beyond the compound and cleaning the site in all respect as per direction of Engineer-in-Charge.

ESCON INDIA

DECENCY CONSTRUCTION