EROSION: Erosion can be the result of general weathering described above, or it can be a more localized phenomenon based upon handling or exposure. Wind driven, airborne abrasives such as dirt, grit, and other particles may selectively wear away detailing. The effects will depend largely upon the direction of prevailing winds. One of the few effective ways to address this problem is by landscaping where plantings and/or landscape grade can deflect the wind. Such landscaping and/or grading may range from the simple and inexpensive to a major and expensive intervention. It would have to be consistent with the policy for the management of cultural landscapes. It may, however, be cost effective when considering the extended life of the building. The symptoms of erosion can be as simple as the general loss of polish and edge sharpness as described above, or it can be very localized, specific wear due to contact with landscaping and mowing equipment. Localized damage due to contact by mowing or other maintenance equipment is preventable. Where there is evidence of recurrent physical damage, steps should be taken to protect the stone.
Posted on: Thu, 18 Sep 2014 01:42:30 +0000
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