Convent of the Sacred Heart Portico Ceiling

The Otto and Addie Kahn House, located at 1 East 91st Street in New York, NY, is an Italian Renaissance house built between 1913-1918. British architect J. Armstrong Stenhouse and associate architect C.P.H. Gilbert designed the home based upon the Renaissance structure Palazzo della Cancelleria in Rome. A prominent feature of the building is the internal carriageway; a unique design feature that provided utmost privacy. The carriageway acts as the main entrance to the house, and is protected by large imposing wood doors and decorated with limestone walls and textured stucco soffit ceiling. The property acted as the Kahn home until 1934 when it and the neighboring home, the Burden House, were both acquired by the Covent of the Sacred Heart, a private school for girls. A non-obtrusive connection was made between the two, but relatively little has been altered on the exterior of the buildings. The Kahn house was made a New York City landmark in 1974 and added to the National Register of Historic Places in 2006.

In 2024, EverGreene was contracted to perform plaster repairs on soffit ceiling of the interior carriageway of the Kahn House. A cursory survey revealed numerous substantial cracks, failing plaster patches, and areas requiring replacement. EverGreene plaster specialists selectively removed all unstable material, including removal of corroded lath in areas of full replacement. Each area was then prepped and infilled using a compatible material, which was tooled and finished to match the adjacent original material. Finally, the repairs were inpainted to match the color and texture of the original finishes.