How to Install Corrugated Roofing: 8 Steps (with Pictures)
4.. Screw down the panels.. Pre-drill the holes, and use 10 by 2 in (25..4 by 5..1 cm) screws with polycarbonate washers.. Continue across the roof until it is completely covered, lapping over the previous panel by at least 2..5 inches (6..4 cm) minimum..