Vitro Architectural Glass

Vitro Glass donates Starphire® low-iron glass to Fallingwater window restoration project

Historic masterpiece was among first to be specified with ultra-clear glass in the 1930s

Fallingwater Project

Photo courtesy of the Western Pennsylvania Conservancy

PITTSBURGH, October 20, 2020 – Vitro Architectural Glass (formerly PPG Glass) announced that it has donated Starphire Ultra-Clear® glass to replace multiple windows at Frank Lloyd Wright’s Fallingwater in Mill Run, Pennsylvania.

As part of an on-going restoration effort, the Western Pennsylvania Conservancy—owners and caretakers of Fallingwater—recently replaced the glass in 16 of its windows with Starphire® glass as part of a larger conservation project addressing corrosion of steel door and window frames. The Conservancy is scheduled to restore more windows using Starphire® glass as part of its proposed preservation efforts in the coming years.

Wright specified Waterwhite glass, a proprietary low-iron formulation developed by Vitro Architectural Glass in the 1930s, and the precursor to Starphire® glass. The architect was drawn to the glass’s capacity to diminish the visual barrier between the home’s interior space and its iconic forest setting. Starphire® glass is commonly selected by today’s leading architects to achieve a similar objective.

Vitro Glass also donated Starphire glass to Fallingwater for a major renovation project that took place there between 2009 and 2015. By the time that project was complete, the Western Pennsylvania Conservancy had replaced glass in 320 windows with laminated glass fabricated from Starphire Ultra-Clear® glass.

Starphire® glass remains the clearest, most transparent commercial float glass available today with visible light transmittance (VLT) of 91 percent in a standard ¼-inch (6-millimeter) thickness.

To learn more about Starphire® glass, visit or call 1-855-VTRO-GLS (887-6457).

Editor’s note: High-resolution photography is available upon request.

Starphire® and Starphire Ultra-Clear® are registered trademarks owned by Vitro.

About Vitro Architectural Glass

Vitro Architectural Glass, part of Vitro, S.A.B. de C.V. (BMV:VITROA), the largest company of its kind in the Americas, manufactures a range of industry-leading, energy-efficient products such as Solarban®, Sungate® and Starphire Ultra-Clear® glasses at U.S. plants in Carlisle, Pennsylvania; Fresno, California; Salem, Oregon; and Wichita Falls, Texas. Committed to sustainable manufacturing processes and products, the company also operates one of the world’s largest glass research and development facilities in Pittsburgh and four residential glass fabrication plants in Canada. Upholding the values of “Together, We See Further” across the architectural, automotive and containers markets, Vitro strives to realize the power of partnership to ensure that projects meet or exceed ever-evolving sustainability expectations as well as glass requirements. For more information, please visit

Vitro Architectural Glass

Media Contact:
Robert J. Struble
Vitro Architectural Glass