Preservation Technology — The Three G’s: GFRG, GFRC, and GFRP

Preservation Technology — The Three Gs: GFRG, GFRC, and GFRP

Join the California Preservation Foundation for Part I of a multi-program themed series on Preservation Technology.

Part I will focus on the manufacture/assembly, composition, use, and restoration of three key ‘G’s’ of preservation materials: Glass Fiber Reinforced Gypsum (GFRG), Glass Fiber Reinforced Polymer (GFRP), and Glass Fiber Reinforced Concrete (GFRC).

The program will include an introduction to the materials, how they are used in historic preservation, and how they meet material considerations of the Secretary of the Interior Standards; when and why they are used in both original construction and historic preservation projects; the chemistry, manufacture, and testing of each material; and how they age. Case studies will highlight real-world examples of using each material, as well as the positives and challenges associated with them.

This program will be part one of a three-program series with a focus on preservation technology. Two additional programs will include:

  • Thursday, July 11th — Preservation Technology Part II
    Structural Systems, Materials and Codes
  • Thursday, August 1st — Preservation Technology Part III
    Emerging Technologies and New Techniques

*These programs are available individually or may be purchased together at a discounted rate. Members receive a 10% discount on rates shown, with greater discounts offered a higher levels of individual, group, and organization membership:

  • One Program Only: regularly priced ($75 for one program)

  • Two Programs: the second program will be discounted by 33% ($125 for both programs)

  • All Three Programs: the second program will be discounted by 33%, the third program will be discounted by 66% ($150 for all programs)



Lauren Postlmayr

Project Manager & Designer
Page & Turnbull

Lauren Postlmayr is a designer and project manager who brings an interesting mix of disciplines to her projects. In addition to being facile in architecture, interior design, and historic preservation, Lauren completed her thesis on the application of state historic building codes vs. traditional building codes and when to apply them to a design to meet the Secretary of the Interior's Standards. Lauren’s projects cross all sectors, with particular strength in historic civic, residential, and higher education buildings. She holds an MFA from the University of North Carolina—where she taught AutoCAD, InDesign, and Illustrator—and an undergraduate degree in interior architecture from Woodbury University. Lauren, an active member of the California Preservation Foundation, serves on CPF’s Education Committee.  

Ean Frank

Project Manager
EverGreene Architectural Arts, Inc.

Ean joined EverGreene in 2023 as a Project Manager with nearly thirty years of dedicated historic preservation experience, including the last two decades successfully managing historic preservation projects. Prior to functioning as a full-time manager, Ean was a traditional trades craftsperson, who specialized in wood and plaster restoration and mortar reproduction.  His involvement in projects spans stabilization, preservation, adaptive reuse, and restoration of both public and private venues, completing dozens of high-profile, grant-funded public historic landmark projects, and receiving professional awards and accommodation for his service. He brings extensive experience working in venues containing sensitive and valuable artifacts and secure military sites. A small sampling of these projects includes: Independence Hall, Mission San Gabriel, Tule Lake Internment Camp, Lucy the Elephant, Cliveden and The Sweeton House.

In addition to his direct management and tradesman involvement, Ean has functioned as a safety compliance instructor and implementation officer. He has trained superintendents for numerous general contracting firms in the fundamentals of project supervision and has developed a curriculum tailored to preservation. Prior to joining EverGreene, Ean was a Project Manager with Spectra Company on the West Coast. He has performed management services for national and local general contractors during historic preservation campaigns. In total, Ean has been involved in the preservation of over 100 registered landmarks. Outside of his vocation, Ean was a founding member of the Human Relations Committee in Collingswood, NJ, which operates to ensure an empathetic environment among diverse populations. Ean is also active in competitive martial arts, such as Jiu-Jitsu and MMA. He received his Bachelor of Arts from Rutgers University in Camden, NJ in Construction Management.

John Lesak, AIA, LEED AP, FAPT

Page & Turnbull

John D. Lesak, AIA, LEED AP, FAPT, is based in Los Angeles and is Principal-in-Charge of Page & Turnbull’s 16-person Southern California office. With an interdisciplinary education in architecture, engineering, and materials science, John has specialized in the preservation, rehabilitation, repair, and reuse of historic structures since 1993. John meets the Secretary of the Interior’s Professional Qualification Standards for Architecture and Historic Architecture. He served as a historic architect on a number of award-winning preservation projects, including the exterior rehabilitations of the Old Orange County Courthouse, Wisconsin State Capital, and Los Angeles City Hall; the relocation of the Cape Hatteras Lighthouse; and the restoration of the spire at the Frank Lloyd Wright-designed Marin County Civic Center. John also teaches a course on sustainable historic preservation within the USC School of Architecture’s Masters of Heritage Conservation program.

Jeffrey Keenan

Moonlight Molds

The Owner and President of Moonlight Molds, Inc., Jeff has more than 40 years of construction industry experience and 31 years as owner of Moonlight Molds. Jeff has estimated and managed numerous projects ranging from historical renovation to world class museums. Moonlight Molds has been manufacturing interior and exterior architectural cast products — including, but not limited to, decorative columns, cove moulds, ceiling domes, light troughs, and ceiling vaults — for clients across the country since 1984. Clients and projects have included the Beverly Hills Hotel, UCLA's Powell Library, and the Riverside Courthouse Restoration. 

James Ballard

Vice President
GBG Group

James has over 20 years of Non-Destructive Evaluation experience with the GBG group and is currently based at GBG’s UK headquarters in Cambridge. With a varied skill set, James left GBG in 2006 to pursue a career in visual effects for film and television; with credits including Star Trek: Into Darkness and Dr Who. Leaving compositing behind and returning to school, James graduated from London South Bank University with a degree in Civil Engineering and returned to GBG in 2015. James became a Project Manager in 2016 and, since 2018, has been closely associated with GBG US offering engineering support and engineering expertise to the US operations of GBG Group.

Managing projects as diverse as Wind Farm Foundation inspections and the structural assessment of 3rd century masonry vaults, James has travelled to many diverse sites for GBG; including wind farm projects in Thailand, structural investigations in India & Dubai and historic preservation and engineering consultation across the UK and USA. James was recently made Managing Director of operations in the UK and is hoping to bring innovation and excellence to the fore front of GBG Groups future. When not tasting concrete or chewing on historical mortars, James enjoys playing, coaching and watching Rugby.