Name of Work: Special repairs to Leaky roof over entrance portico and fourth floor south and northside terrace area of Singaravelar maligai,Collectorate building at Rajaji salai, Chennai - 1
Sl. No.
Item Description
1
Dismantling, removing and carefully stacking pressedtiles etc, complete and as directed by the departmental officers
2
Finishing the top of roof with one course of machine pressed tiles of size 230mm x 230mm x 20mm of approved quality set in Cement Mortar 1:3 (One Cement and Three Sand) 12mm thick mixed with water proofing compound conforming to ISS at 2% by weight of cement used and the joints pointed neatly to full depth of tiles with the same cement mortar mixed with red oxide and water proofing compound including curing etc., complete complying with standard specification and as directed by the departmental officers
3
Protective Roof Waterproofing – Insulation Coating System: Gal-Tech Multiproof –AD SB modified polymer with cement and fine sand mix ratio 1:2:4 to fill the groves and surface cracks. The damaged and weaker sections of the proof is strengthened with SB modified mortar prepared with Gal-Tech Multiproof – AD over that apply Gal-Tech Multiproof – AP SBmodified polymer with filler mix ratio 1:2 one coat overnight setting. Over that apply Gal-Tech Flexi-Coat modified acrylic cementitious flexible coating – one coat overnight setting. This will seal all the pores and invisible cracks on the existing cementitious layer thus making it an intact strengthened roof. Over that apply Gal Tech SR-COAT a high elastomeric pure acrylic sunlight reflective insulation cum water proofing polymer memberane 2 coats with water mix ratio 5:1.
4
Single Reinforced Epoxy Lining System: Gal-Tech Multiproof-AD SB modified Polymer with cement and fine sandmix ratio 1:2:4 to fill the grooves, pores, wall to floor joints and surface crakes to achieve even surface for further treatment. Over that apply Gal-Tech C.T. Epoxy virgin solvent free anticorrosive two packs resin and hardener 1:1 mix ratio. The prepared mix is then applied as a base coat with uniform application on to the surface it is then impregnated with Gal-Tech GC -110F over that apply Gal-Tech C.T. Epoxy 2 coats making as a joint less rough lining and allow to dry for 48 hours.
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