tender for repairs to the anganwadi building roof work ats.k puthur south in madathukulam town panchayat.; 1 supply and fixing of puf roof panels made up of minimum 0.5mm thick ppgi corrugated sheet at the top ar a plain sheet at the bottom with a layer of rigid cfc free polyurethane foam (puf) of density 40kg + 2 kg/cu as insulation in between the polyurethane foam shall confirm to latest is 12436. the minimum thickness o pu foam layer shall be 49mm for having 50mm (min) thick puf panel. the ppgi sheets shall be of minimum 240 mpa steel grade & shall have a zinc coating of minimum 120 gsm as per is 277/1992, 5-7 microns of epoxy primer on both sides of the sheet & polyester top coat of 18-20 microns on one side/outer side. the ppgi sheets/puf panels shall have a protective guard film of minimum 20- 25 microns to avoid scratches to finished panel during transportation. providing ridges or hips of with plain g.s. sheet fixed with polymer coated or hooks, bolts and nuts 8 mm dia g.i. limpet and bitumen washers etc complete excluding the co of trusses, purlins and inclusive of cutting to size and shape wherever required. 2 removing for existing ac sheet roofing without roof timbers including cost and conveyance of all materials to site and all labour charges etc., complete as per standard specification