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Not only that, but due to the facts that fewer supports and joints are needed with metal buildings, it often requires far less materials to build with it, which keeps down costs. Due to the fact that as little as half as much metal as wood is needed to build a house of identical size, and metal weighs less, it can cost less to transport. It may be surprising for you to know that metal buildings are very environmentally friendly. Metal is completely recyclable. Amounting to about sixty tons per year, more metal is recycled than aluminum, paper, glass and plastic combined! To give a better picture of the environmental benefits, consider that you are able to build a 2,000 square foot home out of metal from six recycled cars.