This Architectural Drawing is Detail section of Roof with dimensions. Roof plane: This is the surface of the roof. It is flat, but pitched or on an angle. It is also called the field of the roof. Ridge: This is the top or peak of the roof, where two roof planes meet. Valley: This is where two pitched roof faces connect and project inward. The first layer of any roof is the framing. This is what gives the roof its shape and is the foundation for the rest of the materials. The framing is made up of trusses that support the weight of all the roofing materials-- their triangular shape helps support and distribute the weight. Asphalt shingles or another type of roofing material. This is the layer that most people think of when talking about a roof. This is the top layer of your roof system and will be the type of roofing material you choose (asphalt shingles, metal roofing, cedar shake roofing, synthetic roofing, etc.). For more details and information download the drawing file.