The roof structure is the frame for the roof. Think of it as the bone structure of your body. Depending on the structure of your home, it’s either made of rafters, trusses, or beams and defines the shape of the roof. There are many types of roof structures, gable end, hip, mansard, dormered, and gambrel to name a few. Most residential roofs in this area are made of wood lumber (as opposed to steel used on commercial projects). The floorplan of a home and the final roof covering determine the roof’s structure. For instance, a house with concrete tiles is different than one with asphalt shingles because the roof structure must support the extra weight. Also, it is the roof structure that determines what the slope of the roof will be.