10-19-11: BUILDING TYPE AND CONSTRUCTION:
   A.   No galvanized or unfinished steel, galvalum or unfinished aluminum buildings (walls or roofs), except those specifically intended to have a corrosive designed finish shall be permitted in any zoning district, except in association with farming operations, or in industrial zones, or as allowed by this title.
   B.   Exterior building finishes shall consist of materials comparable in grade and quality to the following:
      1.   Brick.
      2.   Natural stone.
      3.   Decorative concrete block.
      4.   Cast in place concrete or precast concrete panels.
      5.   Wood; provided, the surfaces are finished for exterior use and wood of proven exterior durability is used, such as cedar, redwood or cypress.
      6.   Curtain wall panels of steel, fiberglass and aluminum (nonstructural, nonload bearing); provided such panels are factory fabricated and finished with a durable nonfade surface and their fasteners are of a corrosion resistant design.
      7.   Glass curtain wall panels and glass block.
      8.   Stucco.
      9.   Vinyl.
      10.   Steel, aluminum and masonite siding.
      11.   Other materials as determined by the city building official but not including galvanized or unfinished metal, except in industrial zones and for farming operations. (Ord. 2004-40, 1-3-2005)