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It -2- A. Maintenance The maintenance of any historic structure or site shall in no .jay involve any direct physical change except for the general cleaning and upkee, of the landmark The Commission shall encourage the proper maintenance of all structures or sites. B. Treatment Treatment shall be defined as any change of surface materials that will not alter the style or or.iginal form in any way. Such improvements include painting, reroofing, glazing, resurfacing drives or landscaping lawns and may involve a change that can potentially enhance or detract from the character of the landmark. A treatment change of any surface whether on the landmark or in its environment may require a Certificate of Appropriateness if it significantly alters the appearance of the landmark. Although these kinds of changes may not require a Building Permit, a Certificate of Appropriateness may be necessary. The Commission will review the proposed treatment for character and style consistency with the original surfaces in material selection, color and scale. C. Renovation and Additions Renovation is the modification of a structure which does not alter the general • massing while an addition is a change in mass. A modification i•:hich involves the removal of a part of the landmark should be considered under demolition (See Demolition). Additions to landmarks must not detract from the original fora) and unity of the landmark and must not cover singular examples of architectural detail. Additions to landmarks should be added in a manner that does not disrupt the visible unity or overall appearance of the site. The proportions, P.iaterials and ratios of the existing structures should be car-ried through in the addi- tions. Care must be taken not to change or alter the following: I. Structure - Necessary structural improvements, where safety demands, shall be accomplished in such a way as to cause minimal visual change to the original style and construction. 2. Construction and Style - All work shall be done in the architectural style and in a technique compatible with that of the original structure. A change that alters, removes or covers existing significant stylistic detail shall not be permitted. A change which adds detail of another style :ill not be per- mitted. 3. Materials - Additions and improvements involving any new material on the landmark shall be of the same material as the original. It should be the same size, color and texture. An alternative material may be allowed if it duplicates the original. •�. a. ti•:ood - all wood trim shall conform with existing trim in shape and size. b. siding materials - in no case should original materials of landmarks be altered or covered with additional siding. Structures already sided with