PRESS RELEASE

September 28, 2022

SAINT-GOBAIN EXTENDS ITS SUSTAINABLE SOLUTIONS OFFER FOR FACADES IN EUROPE BY INVESTING IN BUILDING INTEGRATED PHOTOVOLTAICS

Saint-Gobain and the solar manufacturer Megasol, the European leader in Building Integrated Photovoltaics (BIPV), announce a strategic partnership. As part of this partnership, Saint-Gobain has acquired a minority stake in Megasol's business unit that develops and manufactures building-integrated photovoltaics at its site in Deitingen in Switzerland. The partnership enables Saint-Gobain to extend its sustainable solutions offer for façades and to become the leading provider for BIPV façade solutions in Europe, one of the fastest growing segments of façade construction. At the same time, it gives Megasol access to Saint-Gobain's customer base.

BIPV solutions make a significant contribution to sustainable construction and decarbonization by very efficiently producing energy on roofs and vertical façades of buildings. Building owners can not only comply with today's and future energy regulations and increase their own energy efficiency, but they can also generate additional revenue by feeding the electricity into the grid.

"Thanks to the aesthetic design of Megasol's products, its fully customized and, at the same time, industrialized production, we are extending the scope of our applications allowing significant growth for Saint-Gobain's total facade solutions" says Patrick Maier, CEO Saint-Gobain Switzerland.

"With its sustainability strategy and immense expertise in glass and building envelopes, as well as its global presence, Saint-Gobain is the perfect partner to rapidly scale our business with our active solar building materials" says Markus Gisler, CEO of Megasol.

This partnership will further reinforce Saint-Gobain's offering in sustainable façade solutions which varies from one country to another. These façade systems provide high performance and a reduced carbon impact thanks to less embodied carbon and lower energy requirements for a building in use.

This investment is in line with the Group's "Grow & Impact" plan to further strengthen its leadership position in light and sustainable construction.

ABOUT SAINT-GOBAIN

Worldwide leader in light and sustainable construction, Saint-Gobain designs, manufactures
and distributes materials and services for the construction and industrial markets. Its integrated solutions for the renovation of public and private buildings, light construction and the decarbonization
of construction and industry are developed through a continuous innovation process and provide sustainability and performance. The Group's commitment is guided by its purpose,
"MAKING THE WORLD A BETTER HOME".

€44.2 billion in sales in 2021

166,000 employees, locations in 76 countries

Committed to achieving Carbon Neutrality by 2050

For more information about Saint-Gobain,
visit www.saint-gobain.com and follow us on Twitter @saintgobain

Analyst/Investor relations

Vivien Dardel:               +33 1 88 54 29 77
Floriana Michalowska:   +33 1 88 54 19 09
Alix Sicaud:                  +33 1 88 54 38 70

Press relations

Patricia Marie:              +33 1 88 54 26 83
Laure Bencheikh:          +33 1 88 54 26 38
Susanne Trabitzsch:      +33 1 88 54 27 96

ABOUT MEGASOL HOLDING AG

Megasol HOLDING AG is a Swiss solar module manufacturer with headquarter and production facilities in Deitingen (Solothurn/Switzerland) and has been producing highly efficient photovoltaic modules for almost 30 years. The company is the technology leader in the field of colored and customized solar facades as well as solar tiles and solar roof systems. Megasol produces exclusively with renewable energies. The company is represented in 18 countries and currently employs 140 people in Switzerland.

For more information about Megasol,
visit www.megasol.ch

Media relations
Daniel Sägesser: Tel.: +41 62 919 90 61, daniel.saegesser@megasol.ch