1. One of the finest surviving examples of stone carving on a small building in the United States was repaired on a budget. An Albany, N.Y., residential brownstone with intricate stone carvings over every square inch of its three and a half stories attracted a panel of expert preservationists to stage a sandstone facade symposium there in 1992. The house was both the setting and main focus for the architects, contractors and material suppliers who attended. There was no shortage of suggestions on how to restore its crumbling facade, but there was a shortage of cash.Three years later, when pieces of the facade started to fall onto the street, the owner's focus shifted from restoration to repair. Because only the facade was damaged and unstable and its brick backup wall was generally sound, Ryan-Biggs suggested synthetic patching.The owner agreed, as did Albany's historic commission. Work began to address the facade's three problems: Facade delamination from the back-up wall
  2. Internal delamination and spalling of horizontal surfaces, primarily window sills
  3. Weathering

When the repair was completed in 1996, not a single feature of scrollwork had been lost from the original facade. Synthetic patching had enabled a 20th-century mason to duplicate the intricate carvings of 19th-century masons so that passersby could enjoy them well into the 21st century. Keywords: delamination, sandstone, scrollwork, surface patching, polymer-modified cementitious mortar, Custom System 45, stone strengthener, synthetic patching