For typical Bullnose verandahs in non-traffic applications the maximum allowable span is 1800mm. The overlapping sheets need to be secured at the midspan with either a heavy-duty pop rivet or stitching screw.
The minimum recommended roof pitch for 0.60 curving quality CORODEK® is 5° (1 in 12). For roofs with end laps the minimum lap is 200mm for pitches between 5° - 15° and 150mm for roof above 15°. For walls allow maximum end laps of 100mm.