Structures that are visible from public roads shall be compatible with each other and with traditional structures in the surrounding area in architecture, design, massing, materials, proportion, texture, color and placement, and shall harmonize with traditional elements in the architectural fabric of the area. Building components such as windows, roof lines and pitch, doors, eaves and parapets shall be compatible with historic structures in the Town. Vertical, double-hung windows and steeply pitched roofs are encouraged. Designs shall avoid flat roofs, large expanses of undifferentiated facades, and long, plain wall sections. Rooftop and ground-level mechanical equipment shall be screened from public view using materials harmonious with the building, or shall be located where they are not visible from any public ways.