Roofs are helping builders in Chicago offer their clients additional outdoor spaces, according to this article. The cost of rooftop terraces vary depending on the structure of the roof, as well as the need to comply with building codes. "The flat roof costs more than a pitched roof because it requires a different kind of truss to support the weight. And, you need a water drainage system," said Jeff Benach, co-principal of Lexington Homes.
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