You should have the necessary knowledge for doing it so as not to make mistakes. The worst mistake happens when we have to buy lacking materials quickly. The special software was created to avoid such problems. This is a software for calculating roofing.
Roof Builder is mainly for calculating necessary material for roofing, completing elements and screws for roofs of various configurations. It also has scheme of laying the sheets on each element of roof.
Free related programs: roof, sheets, calculation, cad, office