NYCSCA H.S. 435M Manhattan Center for Science and Mathematics

The State Historic Preservation Office-eligible Modern building, which houses a public high school in Manhattan’s East Harlem neighborhood, required repairs due to both age and weather-related fatigue, but also in part because a past repair failed.

The building was an emergency project referred to D&B as a masonry project. As a result of our investigations, it was determined the decorative copper roofs and cast stone cupola assembly needed to be completely removed and replaced. We designed, documented and thoroughly detailed the proposed work, and provided construction administration services during construction.

This project showcases our skills in the expert detailing of the reconstruction of the building’s neoclassical ventilation tower, 60-year-old standing seam copper roofs and various built up roofing systems. It is also a good example of different roofing systems integrating with existing and new masonry construction.

The existing design of the ventilation tower was a masonry and steel composite, which was all clad with lead-coated copper. We decided not to reconstruct the tower in the way that it was originally constructed; rather, we developed an innovative reinforced cast stone bond beam system that is stronger, lighter and less susceptible to water infiltration.


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