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<br />Rehabilitation <br /> <br />Recommended <br /> <br />Not Recommended <br /> <br />Building Site <br /> <br />Identifying plants, trees. fencings, walkways, outbuild- <br />ings. and other elements that might be an important <br />part of the property's history and development. <br /> <br />Retaining plants, trees, fencings, walkways. street <br />lights, signs, and benches that reflect the property's <br />history and development. <br /> <br />Basing decisions for new site work on actual knowl- <br />edge of the past appearance of the property found in <br />photographs, drawings, newspapers, and tax records. <br />If changes are made, they should be carefully evalu- <br />ated in light of the past appearance of the site. <br /> <br />Providing proper site and roof drainage to assure that <br />water does not splash against building or foundation <br />walls, nor drain toward the building. <br /> <br />Making changes to the appearance of the site by <br />removing old plants, trees, fencings, walkways. out- <br />buildings, and other elements before evaluating their <br />importance in the property's history and development. <br /> <br />Leaving plant materials and trees in close proximity to <br />the building that may be causing deterioration of the <br />historic fabric. <br /> <br />Building: Structural Systems <br /> <br />Recognizing the special problems inherent in the <br />structural systems of historic buildings, especially <br />where there are visible signs of cracking, deflection. or <br />failure. <br /> <br />Undertaking stabilization and repair of weakened struc- <br />tural members and systems. <br /> <br />Supplementing existing structural systems when dam- <br />aged or inadequate. Replace historically important <br />structural members only when necessary. <br /> <br />26 <br /> <br />Disturbing existing foundations with new excavations <br />that undermine the structural stability of the building. <br /> <br />Leaving known structural problems untreated that will <br />cause continuing deterioration and will shorten the life <br />of the structure. <br />