Roof. The type, shape, pitch, texture and color of a roof shall be considered as an integral part of the design of a building and shall be architecturally compatible with the style, materials, colors and details of such building. The minimum permitted roof pitch shall be eight on 12, and all gables on a building of a minimum of two (2) stories in height, provided that all visibly exposed walls shall have an articulated cornice that projects out horizontally from the vertical building wall plane. A mansard roof may be permitted, but only if such is located on the third story of a building, completely and integrally enclosing such story. Flat or mansard roofs shall be prohibited on all one-story buildings. Architectural embellishments that add visual interest to roofs, such as dormers, belvederes, masonry chimneys, cupolas, clock towers and such similar elements shall be permitted, provided that such are architecturally compatible with the style, materials, colors and details of the building.