Details: dismantling plain or corrugated steel sheeting, any gauge thickness including nainital or similar pattern roof coverings complete, all as specified and as directed s&f 0.63mm thick galvanised, corrugated mild steel sheeting with two corrugations side lap, fixed with coach screws and washers, in roofs, walls etc. with grade of zinc coating 275 complete, all as specified and as directed. s&f 0.80 mm thick plain, galvanised, mild steel sheeting, in ridges, hips, valley gutters, drip and straight flashings (length and girth as fixed) with grade of zinc coating 275 complete all as specified and as directed. m&l for preparation of new steel and iron surfaces of any description over 10 cm in width or girth, not otherwise described and applying two coats of synthetic enamel paint over a coat of red oxide, zinc chrome primer, complete all as specified and directed. s&f 0.71 mm thick plain aluminium sheeting alloy 31000 h4 in ridges, hips, valley gutter, drip and straight flashing (length and