(A) Permitted Materials.
(1) Primary Materials. A minimum of 50% of each visible façade surface shall be finished in brick, stone, natural wood clapboard, wood board and batten, or wood shingles. Modern manufactured materials that create the appearance of these materials such as Hardiplank™, architectural panels, or cast stone may be considered appropriate. Glass cladding must be installed at least 18 inches from the ground. (See § 151.1608 for additional regulations on glazing.)
(a) Atriums, entryways or additions which extend from the main foot print and do not exceed 10% of the total floor area of a building or are designed to be used as a conservatory, or entry feature may be exempt from the primary materials standards and be almost entirely glazed provided glazing is installed at least 18 inches from the ground.
(2) Accent Materials. No more than 30% of each visible façade may be clad in the following materials: copper, terra cotta, or decorative concrete masonry units, stucco, and EIFS (exterior insulated finish systems), decorative precast panels and non-reflective architectural metal panels
(3) Other Materials. Other materials not listed as prohibited may be considered by the Planning Commission on a case-by-case basis as a primary or accent building material. The use of energy producing elements, advanced roofing features, and other energy efficient features is encouraged.
(4) Visible roofing materials shall be appropriate for the architectural style of the structure. Dimensional asphalt shingles, slate, synthetic slate, and tile are permitted materials.
(B) Prohibited Materials.
(1) Exterior covering materials that are prohibited include vinyl, aluminum siding, standard concrete masonry units (cinder block), tilt-up concrete, corrugated steel, and highly reflective materials such as mirrored glass or chrome.
(C) Permitted Colors.
(1) The base colors used on buildings in the HOS District should be of the natural color of the material in the case of brick or stone, or of a muted pallet. Brighter more vivid colors should be reserved for limited use as a trim or accent.
(a) Any proposed color or materials scheme not consistent with these guidelines, including but not limited to those with trademarked or brand affiliated colors, must be approved by the Planning Commission.
(b) Exemption for signs. The permitted colors do not apply to signage as regulated by Chapter 151.30.
(D) Prohibited Colors.
(1) No fluorescent, neon, or reflective colors shall be used in the construction of a new building or renovation of an existing building within the corridor.
(a) Exemption for signs. The prohibited colors shall not apply to signage as regulated by Chapter 151.30.
(E) Color and Material Variation.
(1) A maximum of four different materials or colors shall be used on a single structure, except in the case where the building's façade is designed to appear as more than one building. In such case, each element may use a maximum of four colors and or materials, but the overall color scheme of the building should be coordinated.
(2) Transition of Materials.
(a) When a transition from one material to another is made on the same façade, it shall be completed either with appropriate trim or as an accent with variation such as quoining or reveals based on the material thickness.
(b) When a transition in materials is made from one façade to another, the transition of materials shall be made at an inside corner.
(Ord. 3-2010, passed 4-7-10)