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elements in scale, type and appearance. Accessory structures such as decks, gazebos, fountains, or small outbuildings should be appropriate to surrounding site elements in scale, type and appearance. Plant materials in close proximity to the buildings and which are causing deterioration to the building's historic fabric should be removed and replaced by more suitable flora as approved by the Historic Preservation Commission. Prohibited No changes may be made to the appearance of the site by removing trees, fencing, walkways, outbuildings or other site elements before evaluating their importance to the property's history and development. Front yard areas shall not be transformed into parking lots nor paved nor blacktopped. Front yard areas shall not be fenced, or fences shall not extend forward beyond the setback line of the property. Telephone or utility poles with high intensity overhead lights should be installed so that they cannot be seen from the thoroughfare. The installation of unsightly, large devices such as television satellite dishes shall not be permitted in areas where they can be viewed from the public thoroughfare. II. EXISTING STRUCTURES A. BUILDING MATERIALS Original exterior wall materials in the District include brick, stucco, clapboard, wood shingles and masonry block. In some instances, vinyl or aluminum siding has been applied over the original material. Required Original exterior building materials shall be retained. Deterioration of wood materials shall be prevented through repair, cleaning and painting. The existing architectural detail around windows, porches, doors and eaves should be retained or replaced by replicas of the same design and materials when deteriorated beyond repair. Masonry including brick and stucco shall be cleaned only when necessary to halt deterioration or to remove stains, and shall be done with a method acceptable for the preservation of the surface: i.e. low pressure water and soft natural bristle brushes. When repairing stucco, only appropriate stucco mixture shall be used. Recommended Whenever possible, the original building materials should be restored. Metal or vinyl may be used as an alternative to maintaining or replacing the original surface material when it resembles the original surface material. When used over wood surfaces, this siding should be the same size and style as the original wood. Every effort should be made to retain the original trim around windows, doors, cornices, gables, eaves and other architectural features. Ample ventilation must be afforded the structure when aluminum or vinyl is to be installed in order to prevent increased deterioration of the structure from moisture and/or insects. Mortar joints should be repointed only when there is evidence of moisture problems or when sufficient mortar is missing to allow water to stand in the mortar joint. Existing mortar shall be duplicated in composition, color, texture, joint size, method of application and joint profile. C. WINDOWS AND DOORS Window and door frames are in most cases wood. Brick structures have stone sills and brick lintels. In some cases where synthetic siding has been applied, window trim has been covered. Many structures in the district have aluminum storm windows. Some houses retain wood framed storm windows. Required Original windows and doors including sash, lintels, sills, shutters, decorative glass, pediments, hoods and hardware shall be retained or when deteriorated beyond repair, replaced with units and trim resembling the original. Recommended Wood frame storm windows and doors, painted to match the original, should be used but should not damage existing frames. If new sash and doors are used, the existing or original materials, design, and hardware should be used. When metal storm doors are used, they should be painted, anodized or coated to match the existing. When awnings are used they should be of canvas material. Prohibited