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Edgewater Place Local Historic District II. EXISTING STRUCTURES A. BUILDING MATERIALS Guidebook Original exterior wall materials in the District range from brick, clapboard, shingles, and masonry block to aluminum siding. In the majority of the cases the aluminum siding has been applied over the original clapboard. There are some masonry commercial buildings on Lincolnway. Required Existing exterior building materials shall be retained. Deterioration of wood materials shall be'pre- vented 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 mate- rials when deteriorated beyond repair. Masonry structures shall be maintained, tuckpointed and properly cleaned when necessary. Masonry shall be cleaned only when necessary to halt deterioration or to remove stains, and shall be done with the gentlest method possible, such as low pressure water and soft natural bristle brushes. Stucco surfaces shall be maintained by cleaning and repainted when necessary. When repairing stucco a stucco mixture shall be used. Recommended Whenever possible, the original building materials should be restored. Aluminum or vinyl siding may be used when it is the only feasible alternative to maintaining the original surface material. When used over wood surfaces, this siding should be the same size and style as the original wood. However it must be noted that such material can contribute to the dete- rioration of the structure from moisture and insects. Mortar joints should be repointed only when there is evidence of moisture problems or when suf- ficient mortar is missing to allow water to stand in the mortar joint. Existing mortar shall be dupli- cated in composition, color, texture, joint size, method of application, and joint profile. a. Typical wood frame wall where moist inside air freely i migrates to the outside. Moisture may condense in the wall cavity and be absorbed into the adjacent materials and evaporate as the wall is heated by the sun. INTERIOR EXTERIOR warm. moist air cold. dr% air r IA.—ood siding i 1 moisture •Y. • conde—tion placer ^ �J l b. Typical wall condition with insulation and a vapor barrier facing in (toward the heated side of the wall). The vapor barrier prevents moisture migration, thus keeping the insulation dry. Page 31 INTERIOR`EXTERIOR warm. nwia pit ' cold. dry air �1 moisture ' :a / : � va por barrier