Lecture #1: Re-Cladding St. John’s Church 1822 Bell Tower: A witness to history
Presenter: Sharon C. Park, FAIA, FAPT
St. John’s Bell Tower of 1822 is part of the National Historic Landmark, St. John’s Church, Lafayette Sq., Washington DC (Latrobe 1816). Due to the inaccessibility of the bell tower, it had not been adequately maintained since 1954 when major work was undertaken on the sanctuary. The most critical criteria used to evaluate the various materials, therefore, were durability and extended cycles between maintenance to avoid recurring scaffold costs. The selected material, a carbon resin-acrylic, has at least a 50 year life, has de-minimum expansion and contraction properties, can be milled like wood in long sections, and reduces the need for extensive caulking. The material fabrication can use laser scans to accurately replicate the historic materials and details. In addition, the paint warranty is for 30 years with a 3 coat Keim product. This far outpaces the other materials as will be demonstrated. Freedom Gray is for all metal and flashings for long life and avoidances of staining.
Lecture #2: Revolutionary Preservation to Preserve a Coastal Revolutionary Monument
Presenters: James W. Shepherd, AIA LEED and Susan Pommerer, AIA Leed, SmithGroup
Dorchester Heights Monument is an iconic feature of Boston’s cultural landscape, commemorating the British evacuation of the city on March 17, 1776 and George Washington’s first victory in the American War for Independence. It is a designated National Historic Landmark and a contributing resource within the Dorchester Heights National Register Historic District. Following decades of deferred maintenance and ongoing challenges to manage water and avian infestation, and in preparation for the United States Semiquincentennial, the National Park Service is undertaking a comprehensive repair and rehabilitation.
Continuing Education: 2.0 LU AIA CES credits will be offered for this Tech Talk.
Please note: Video will be recorded.
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This program is part of our Tech Talk series:
Tech Talk #1: Digital Technologies 10/21
Tech Talk #2: Tower Restoration 11/04
Tech Talk #3 Stone Weathering 11/21
Tech Talk #4 Metals Preservation 12/05
