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East Wayne Street Historic District II. EXISTING STRUCTURES Guidebook A. Building Materials Original exterior wall materials in the District include limestone, flagstone, stucco, clapboard, wood shingles, sandstone and masonry block. In some instances, vinyl or aluminum siding have been applied over the original surface. Required Original exterior building materials shall be retained. Deterioration of wood materials shall be prevented through repair., cleaning, and painting. The existing or original 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 , limestone, flagstone sandstone 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, stucco mixture compatible in composition, color, and texture shall be used. Recommended Whenever possible, the original building materials should be restored. Metal or vinyl siding may be used when it is the only alternative to maintaining or replacing 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 metal or vinyl siding has been 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 shalt- be duplicated in composition, color, texture, joint size, method of application, and joint profile. It is emphasized that, prior to initiating any restoration or rehabilitation effort, the property owner should contact the Historic Preservation Commission of South Bend and St. Joseph County which is located in the County/City Building of South Bend. The Commission is an invaluable source of information about all facets of rehabilitation and restoration. a. Typical wood frame wall where moist inside air freely migrates to the oul,ide. Mouture may condense in the wall cavity and be absorbed into the adjacent _ — materials and evaporate a, the wall iv heated by the S1111. INTERIOR - EXTERIOR warm. moist air 4 cold. dry air dc wood siding moisture r? _-condensation plaster 1 (` page 41 b. Typiral wall condition utith insulation and a vapor barrier facing in (toutard the heated .vide of the wall). The vapor barrier prevent, moisture mi{ralion, th t.v keeping the iirvulation d► -r. INTERIOR warm. moist air moisture EXTERIOR cold. dry air 1.4 insulation vapor barrier