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Six Logan Circle after facade rehabilitation.  

PRESERVATION
Tech Notes


MASONRY
NUMBER 1

Substitute Materials: Replacing Deteriorated Serpentine Stone with Pre-Cast Concrete


Robert M. Powers
Mid-Atlantic Regional Office
National Park Service

SIX LOGAN CIRCLE
Washington, D.C.



Constructed in 1878 from the designs of architect Henry R. Searle, Six Logan Circle is a five-story rowhouse which features a highly articulated façade of green serpentine stone laid up in a veneer of quarry-faced, random ashlar blocks with Pennsylvania red brick trim. Located in the Logan Circle National Register Historic District in Washington, D.C., this building sits directly on Logan Circle, an original open space design element of the 1790s plan for the Federal City by Pierre L’Enfant.

Constructed for Naval Commander Allen V. Reed, the property remained a single-family residence until 1940 when the Reed family sold the building. Typical of many of the large residential properties within the district, Six Logan Circle was subdivided and converted into a multiple-unit dwelling after World War II. Over the next forty years the building functioned as a nine-unit apartment complex and received little maintenance during this time.

In 1982, the property was purchased by the Six Logan Circle Associates with the intent of rehabilitating the property into six residential units. A major component of the rehabilitation focused on selecting a treatment for the extremely deteriorated serpentine stone façade.

Use of carefully selected substitute materials as replacement for severely deteriorated masonry is appropriate in limited cases.

 

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