Track 2: Materials over Time: Points of Change

CS2.3 Sustaining Traditional and Non-Traditional Masonry Materials

8:30 AM - 10:00 AM
Location: BNCC- 101BG
CE: 1.5

This session exams methods of sustaining natural and man-made masonry materials across a spectrum of time and geography. The speakers explore a variety of ways to preserve both traditional and more modern stone, brick, stucco, mortar, and a unique block product spanning Calgary to Florida to India.

This course qualifies for HSW credit with AIA and RCEP.

Learning Objectives:


Peter Wollenberg

Wollenberg Building Conservation, LLC

Peter Wollenberg is a Columbia-trained architectural conservator who began his career in historic preservation in Vermont before attending graduate school. Following graduate school, Peter worked for Geier Brown Renfrow Architects in Washington, DC working primarily on the Historic Structure Reports for buildings in the Federal Triangle. Peter moved to St. Louis and worked for Washington University Technology Associates (WUTA), a company that specialized in sculptural and architectural conservation around the country. He started Wollenberg Building Conservation in 1992 and has worked on projects in numerous states ranging from the repair of small stone sculptures to monuments to the Wainwright Building and the Missouri State Capitol.


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Michael Laracy

Project Engineer
Silman Associates

Michael Laracy holds a BS in Civil Engineering from Merrimack College (2013) and a MS in Structural Engineering from MIT (2015). As a fellow of the Tata Center for Technology and Design, his masters thesis focused on converting industrial waste into low-cost environmentally friendly building materials using alkali-activated technology. For two years, Mike and his team balanced lab research at MIT with trips to India to understand the socio-economic factors of trying to introduce a new technology to the developing world. Mike currently works as a Structural Engineer at Silman Associates and remains involved in the ongoing research at MIT.


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Helen M. Thomas-Haney

Jablonski Building Conservation, Inc.

Helen M. Thomas-Haney is a Principal and Senior Conservator at Jablonski Building Conservation, New York City with 15 years of experience. Her responsibilities include: conducting conditions surveys with an emphasis on masonry conservation, on-site sampling, and laboratory testing and analysis of mortars, building materials, and finishes. She earned a BA in Historic Preservation from the University of Mary Washington and an MS in Historic Preservation from Columbia University. She is a Professional Associate with The American Institute for Conservation of Historic & Artistic Works, as well as the Program Chair of the Architectural Subgroup, and a board member of The Northeast Chapter of the Association for Preservation Technology (APTNE).


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Sara Stratte

university of Pennsylvania

Sara Stratte is a second-year master’s candidate in the University of Pennsylvania Historic Preservation program. She received her bachelor’s degree in Anthropology at the University of California, Los Angeles, where she studied archaeology, heritage, and digital humanities. More recently, she has been involved in the preservation of rural wood, stone, and adobe structures in the American West through the National Park Service and the University of Pennsylvania. Ms. Stratte hopes to continue with innovative research that benefits cultural resources in the American west.


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Giovanni Diodati, Architect

Senior Associate
EVOQ Architecture Inc

John Diodati is a conservation architect and educator specializing in materials conservation and traditional building techniques. He is a graduate of McGill University’s School of Architecture (BArch 1990) and is a Senior Associate at EVOQ Architecture / FGMDA since 1999. In his over 28 years of practice, John has led teams of multidisciplinary specialists and been in charge of the materials conservation and building envelope on an impressive number of award-wining projects ranging from modest vernacular structures to the buildings of the Canadian Parliament. John served as a board member of APT since 2009 and vice-president from 2013 - 2018.


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Maanvi Chawla

Graduate Student
University of Florida

In between her graduate studies and architecture school in India, Maanvi has worked in Indian firms including the Indian National Trust for Art and Cultural Heritage (aka INTACH) on heritage inventories, condition assessments, measured drawings; and most significantly on the post-flood damage assessments of her hometown, Srinagar, after the 2014 floods in Kashmir valley. Maanvi majorly contributed to two bodies of research for the Prince Claus Fonds, Netherlands: the CER report on Kashmir Floods 'Cultural Heritage - Damage Assessment Mission' and the 'Technical Guidance Brief for owners of traditional buildings'.

With a focus on the technicalities of heritage, she supplemented her graduate study at the University of Florida with chemistry and geology courses along with her Master in Historic Preservation - to research on historic materials valuable to the local Floridian context, one of them being Ocala block. While focused on gaining technical knowledge of heritage conservation, Maanvi’s goal is to find and learn the balance of conservation and preservation practice: something in between letting go and freezing buildings in time.

Before her master's at the University of Florida, Maanvi had been the US/ICOMOS International Exchange Program candidate from India in 2015. Currently, Maanvi is researching topics of her choice pertaining to Kashmir's historicity and material heritage, the Martin Weaver Scholarship grant, freelance research writing while looking for more work opportunities.


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CS2.3 Sustaining Traditional and Non-Traditional Masonry Materials

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