Page 75 - State College, PA Design Guidelines

• 06.28.2018

6.7 Use the gentlest means possible to clean the surface of
a structure.

a. If cleaning is appropriate, utilize a low-pressure water wash.
b. Perform a test patch to determine that the cleaning method will
cause no damage to the material surface.
c. Harsh cleaning methods, such as sandblasting, can damage
and change the appearance of historic materials and are
inappropriate.

Consider removing later covering materials
6.8 Repair a deteriorated primary building material. and repairing the original, underlying historic
material. (Bloomington, IN)
a. Repair by patching, piecing-in, consolidating or otherwise
reinforcing the material.
b. Repair mortar joints where there is evidence of deterioration.

6.9 Choose a replacement material that matches the
original material in composition, scale and finish.

a. Replace only those materials that are deteriorated and are
beyond reasonable repair.

b. Utilize a replacement material that matches the original. If Harsh cleaning methods, such as sandblasting,
the original material is wood clapboard, for example, then the can damage and change the appearance
replacement material should be wood as well. of historic materials, and are, therefore,
inappropriate.
c. Do not use synthetic materials, such as aluminum, vinyl or
panelized brick, as replacements for historic building materials
such as wood siding and masonry. TREATMENT OF
HISTORIC MASONRY
6.10 Do not cover an original building material with a new BUILDINGS
one. For more information about
appropriate treatments for historic
a. Consider removing later covering materials and repairing the masonry buildings, review the National
original, underlying historic material. Park Service Preservation Brief 1:
b. Do not add an additional layer of new material on top of non- Assessing Cleaning and Water-Repellent
historic building material covering the original. Treatments for Historic Masonry
Buildings. To review a hardcopy of the
brief, visit the Planning Department.

MORTAR JOINTS

For more information about repairing
mortar joints, review the National
Park Service Preservation Brief 2:
Repointing Mortar Joints in Historic
Masonry Buildings. A hard copy is
available for review in the Planning
Department.
Maintain significant historic character-defining walls in their original form. (400 block of East
Fairmount in the Holmes-Foster/Highlands Historic District)

CHAPTER 6 • TREATMENT OF HISTORIC RESOURCES • ADVISORY 69