Different Parts of a Roof Structure


There are many different parts of a roof, as well as different types of roofs, including gable, flat, and mansard. For the most part, though, a typical roof structure will consist of the following parts.


First is the frame of the roof structure. The truss is the “skeleton” of a roof, made of a series of parallel beams. The rafters are the supporting beams that run from the apex to the bottom of a roof, holding up the truss. Eaves are the edges of a roof, typically overhanging the vertical exterior walls of a building. They consist of fascia, soffits, and drip edges.


Then there is the finishing layer on top of the roof. The sheathing consists of boarding—either plywood or particle board—that is laid on top of the truss. It adds structural integrity to the frame and provides a base for the underlayment and shingles. Underlayment is a waterproof seal that is often made of felt and lays over the sheathing. Flashing, meanwhile, is a metal strip that forms a watertight seal between the roof shingles and other materials, like a chimney or vent.

Last but not least are the shingles, which can be made of asphalt, clay, wood, metal, or something else entirely. This top, finishing layer provides waterproofing and a neat appearance.


Whether you want to DIY your own roof or are a roofing contractor in the business of building roofs for residential and commercial structures, Preferred Roofing Supply is your source for the materials you need to get the job done. Our locally and family owned business has been in the construction field for over 12 years, helping homeowners, builders, and contractors find the materials they need at low prices. You can find siding, tools, fasteners, and more from well-known and respected brands like TAMKO and Atlas Roofing. We are located in North Atlanta and we proudly serve all of the greater Atlanta area. Contact us today to begin building a superior roof that will look great and last for decades, all thanks to affordable, high-quality materials.