Keystone Preservation Group

Conservation of Markers, Monuments, Architectural Elements and
Historic Masonry
Keystone regularly provides high-level, specialized conservation services for
the restoration and conservation of historic markers, statues and masonry.
Our role typically includes, but is not limited to:

- pre-construction conditions assessment
- development of specialized treatments to address problematic issues
- documentation during work
- monitoring of conditions after construction

Our staff has successfully completed projects which include:

- cleaning
- stain removal
- removal of biological growth
- removal of previously-applied coatings
- composite repair (patching)
- pinning (stainless steel, nylon, fiberglass)
- adhesive repair (epoxy, modified epoxy, cementitious)
- injection grout
- custom poultices
- plaster repairs
- stucco repairs

First Presbyterian: Pinning

First Presbyterian: Injection grout

First Presbyterian: Before restoration

First Presbyterian: After restoration