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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.

pick from the following. *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.; *The number of sheets required will depend on the brand of corrugated metal that you buy. For example, for wood-roofing felt , 8.5 sheets per square foot would be sufficient.; *Corrugated metal can and will outgrow any other metal you add to the roof during the installation process. However, moving metal allows you to save money on the crafting process.; *This is a measurement of how much corrugated metal you need for your roof. It will be displayed on the underside of the roofing piece, along with a draw chart.;
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.