Corrugated Roof Sheet Calculator
Calculate the number of corrugated roof sheets you need for a roof or wall based on area, sheet width and overlap.
Corrugated sheets overlap on the side, so each sheet effectively covers less than its total width. This calculator determines the number of sheets needed and the total area.
Pro tips
- Install corrugated sheets against the main wind direction so wind cannot lift the overlap.
- For roof pitches below 7°, also plan for end-lap and sealing tape.
Frequently Asked Questions
How much overlap does corrugated sheeting need?
One to two corrugations, or roughly 80-100 mm of side overlap, is common, depending on the profile and manufacturer's specification.
What roof pitch do I need for corrugated sheeting?
From about 5-7° pitch, corrugated sheeting is generally suitable; below that, extra sealing measures are needed.
How do I work out the sheet length I need?
Sheet length should match the roof slope plus eave overhang – corrugated sheets are usually cut to the exact length you order.
Can I also use corrugated sheeting on walls?
Yes, corrugated sheeting also works well as wall or facade cladding, where the overlap is usually a bit smaller than on a roof.