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How to install corrugated metal roofing
Prepare the roof surface by removing any old roofing, any rotten wood, and adding roofing felt to the entire surface.
Roofing felt is a cheap and easy-to-install material: simply nail the sheets into wood, overlapping each sheet by 3 to 4 inches (or about 10 cm).
Calculate the number of sheets of corrugated metal needed.
Divide the area of your roof by the size of the sheets you will be using. Remember that you will want the metal sheets to overlap.