This elegant rooftop deck, made out of Fibron composite decking in "castle grey," provides a breathtaking view of Chicago. The dining area is marked by a pergola and custom lattice privacy screens, and a built-in sound system is great for parties. The LED accent lights add to the ambiance, and there is plenty of outdoor furniture. Planters, made out of composite Azek trim boards, give pops of color to the space. Photo by Barbara Rudolf