3" profile pvc corrugated roofing sheet ideal for sheds, covered walk ways, pergolas, carport roofs and even cloches in the garden or the allotment. In any roof situation it will need to be supported at a maximum of 900mm centres on its length and after the overlap the width of the sheet goes from 762mm down to 647 mm coverage. At 1.0mm thick it comes with a ten year garantee