PITTSBURGH, May 20, 2025 – The newly transformed 20 Mass stands as Capitol Hill's leading mixed-use destination, blending sustainability, innovative design and modern functionality with effortless sophistication. Showcasing Solarban^® 72 Acuity^® glass by Vitro, 20 Mass earned a prestigious 2024 Design Award from USGlass Magazine, a testament to its architectural excellence.

The visionary redevelopment, led by architectural firm Leo A. Daly and commissioned by The RMR Group, combines a four-star Royal Sonesta Hotel, chef-driven retail, and sweeping Class-A office spaces with a 14,500-square-foot penthouse featuring expansive views of Washington, D.C. The project also maximized the site’s potential through a complete reconstruction, including an extensive green roof and a new glass curtainwall.

The innovative facade features Solarban^® 72 Acuity^® glass, a superior solar control low-e glass designed to enhance energy efficiency while optimizing natural light and occupant comfort. Offering exceptional visual clarity and high solar performance, the glass curtainwall amplifies the building’s aesthetic appeal and contributes to its eco-conscious design.

In a one-inch insulating glass unit   (IGU), Solarban^® 72 Acuity^® glass delivers a visible light transmittance (VLT) of 67% and a solar heat gain coefficient (SHGC) of 0.28.

LEED^® Gold and WELL Building Standard^® certified, the revamped 20 Mass offers 183,000 square feet of office space, 13,800 square feet of retail, and a 14,500 square foot penthouse amenity space with views of the Capitol. It is also home to the luxury Royal Sonesta Washington, D.C. Capitol Hill hotel and offers direct access to world-renowned D.C. landmarks and attractions.

20 Mass redefines Capitol Hill’s urban fabric, establishing a destination that harmonizes community, innovation and environmental commitment.

Project credits:

• Architect: Leo A. Daly
• Glass Fabricator: Press Glass
• Glazing Contractor: Pioneer Cladding & Glazing Systems
• Owner/Developer: The RMR Group
• General Contractor: DPR Construction
• Photography: Jim Cunningham

For more information about Solarban^® 72 Acuity^® glass and Vitro’s entire portfolio of architectural glasses, visit vitroglazings.com or call 1-855-VTRO-GLS (887-6457).

About Vitro Architectural Glass

Vitro Architectural Glass is the largest glass producer in the Western Hemisphere, manufacturing a range of industry-leading, energy-efficient, high-performance products such as Solarban^®, Sungate^® and Starphire Ultra-Clear^® glasses. Committed to continually raising the industry standard for sustainability, Vitro was the first U.S. glass manufacturer to have its complete collection of architectural glass products earn Cradle to Cradle Certified^® status and the first North American manufacturer to publish third-party verified Environmental Product Declarations (EPDs) for flat glass and processed glass products. Additionally, as of April 2024, all Vitro architectural glass products meet the Top 20% Low Embodied Carbon (LEC) material Global Warming Potential (GWP) threshold the U.S. General Services Administration (GSA) established pursuant to the Inflation Reduction Act of 2022 and related guidance from the U.S. Environmental Protection Agency. Vitro operates seven glass production facilities across North America, four residential glass fabrication plants in Canada and one of the world’s largest glass research and development facilities in Pittsburgh, Pennsylvania. For more information, please visit VitroGlazings.com.

Media Contact:
Robert J. Struble
Vitro Architectural Glass
412-820-8138
rstruble@vitro.com
vitroglazings.com