Materials Technical Committee

The Technical Committee for Materials, co-chaired by Paul Gaudette, Chris Gembinski and Lorraine Schnabel, serves as a clearinghouse for information both on materials and architectural assemblies of historic building construction, and the materials for building repair. The purpose of the committee is to gather information on the following:

  • the fundamental physical and chemical properties of building and repair materials
  • how physical and chemical properties relate to material performance, and the mechanisms of loss of performance
  • historical information on material manufacturing and assembly
  • sources of historic materials.

The committee will also explore methods proposed for the following:

  • testing historic materials performance properties
  • testing materials to be used for repair
  • treatment of building assemblies and architectural materials
  • preservation and replication using substitute materials
  • meeting national and international treatment standards.

Our primary goal is developing dynamic methods for sharing material information among
preservation professionals. Active initiatives include:

  • Materials Talks: Bimonthly webinar-format presentations with Q&A on materials topics.
  • Materials Discussions: Open discussions of various types on materials and research topics
  • Lunch-and-Learns: Webinar-format presentations on products for preservation

To join our group, or ask about any of our initiatives, contact the Technical Committee
for Materials at [email protected].

Annual Meeting Sessions and Workshops

2020, Edmonton

Meeting Track 2: Materials Conservation for the Future:  Tradition, Sustainability and Innovation

2019, Miami

Workshop: Understanding the Role of Materials Testing in the Preservation Design

Meeting Track 2: Sustainability and Conservation of Built Heritage in the Americas

2018, Buffalo

Meeting Track 2: Materials over Time - Points of Change

Annual Meeting Minutes:
Annual Meeting 2019 (Miami, FL)
Annual Meeting 2018 (Buffalo, NY)
Annual Meeting 2017 (Ottawa, ON)


Paul Gaudette
Chris Gembinski

Lorraine Schnabel

Materials Talks


Past Materials Talks

Materials Discussions
February 23: Street Art and Graffiti

2021 Committee Meetings and Minutes:
May 20
April 27
January 28

TC-M Information Brochure


Links and Resources
AIC Find-a-Conservator

APT Practice Points

Building Technology Heritage Library (BTHL)

"Throwback Thursday" Series in Architect, derived from BTHL

Conservation & Art Materials Encyclopedia Online (CAMEO)

Preservation Briefs (National Park Service)

Viaduct: a communication tool for analysis in heritage