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Whenever possible, the orifi inal 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 satne size and style as the original wood. Iiowever it trust be notal that such material can contribute to the deterioration of the structure from moisture and im.'ects. 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. Prohibited Wood siding shall not be resurfaced with new material, such as artificial stone, brick veneer, asbestos or asplialt shingles, which is inappropriate or was unavailable; when the building was constructed. Sandblasting or the use of harsh detergents shall not be used on masonry or stucco. This method of cleaning erodes the surface miaterial and accelerates deterioration. Not Recommended Waterproof or water repellent coatings or surface consolidation treatments should not be used unless required to solve a specific problem that has been studied and identified. Coatings are frequently unnecessary, expensive, and can accelerate deterioration of the masonry. 'Mortar joints which do not need repointing should not be. Repointing should not be done with mottar of high Portland cement content, which can often create a bund that is stronger than the building; materials. This can cause deterioration as a result of differing coefficient of expansion and the differing porosity of the material and the mortar, which can result in serious damage to adjacent brick. faint should riot be removed from masonry surfaces indiscriminately. S'C'Al i�IZECON'l11ENDAI'ION: Staff recommends approval ofthe proposed project. Report prepared by Elicia D. Feasel, Assistant Director