Providing and fixing polycarbonate sheet sheet should have protective guard film of 25 microns minimum to avoid scratches during transportation metre or as desired by Engineer-in-charge. The sheet shall be fixed using self drilling /self tapping screws with EPDM seal, and the joints shall be provided with aluminium strips at top and bottom as a seal complete upto any pitch in horizontal/ vertical or curved surfaces, excluding the cost of purlins, rafters and trusses and including cutting to size and shape wherever required. Pollycarbonate sheet Multiwalled 12mm thick