Saint-Gobain Canada Announces Completion of Construction of Its CertainTeed Kootenay West Gypsum Mine in British Columbia

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CANAL FLATS, British Columbia--(BUSINESS WIRE)--Oct 15, 2025--

Today marks an important milestone for Saint-Gobain Canada’s CertainTeed Kootenay West Gypsum Mine, as the site completed the final phase of construction and enters full production capacity with the installation and commissioning of permanent equipment on site. The Kootenay West Gypsum Mine located near Canal Flats, BC near the border of Alberta, is a strategic expansion investment by Saint-Gobain to ensure a quality supply chain of raw material for its Western Canadian operations.

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CertainTeed Kootenay West Gypsum Mine

This new mine, which began its first construction phase in November 2019, is supplying CertainTeed’s Vancouver and Calgary gypsum wallboard plants with 400,000 tons of high-quality gypsum rock annually. Employing 30 people across the mine and related operations, the Kootenay West Gypsum Mine has an anticipated operational life expectancy of over 40 years. This overall project represents a nearly $50 million CAD investment in the Group’s western operations.

“It is with great pride that we officially launch full operations of our Kootenay West Gypsum Mine in British Columbia, a strategic expansion of our presence in Canada, strengthening our operations to continue meeting the construction market demand,” says Jean-Claude Lasserre, CEO, Canada, Saint-Gobain. “With this new mine, we reinforce our commitment to supply Western Canada with our high-quality CertainTeed products and solutions for decades to come.”

Extension of Windermere Mine operations

The Kootenay West Gypsum Mine project was initiated to replace the Windermere Mine operations near Invermere, BC to meet gypsum rock quality requirements for wallboard production. The Windermere Mine will continue its operations to supply external clients in the agriculture industry and cement industry, extending the anticipated operational lifetime of the Windermere Mine for an additional 15 years.

Next phase for Kootenay West Gypsum Mine

CertainTeed Canada initiated a permitting phase for a future rail loadout project which will significantly reduce trucking distances from 4.5 million kilometres to 250,000 kilometres annually. This project would support Saint-Gobain’s sustainability goals by significantly reducing Scope 3 carbon emissions due to transportation of raw material.

CertainTeed’s Antrim Gypsum Project

Following the environmental assessment approval from the Nova Scotia Department of Environment and Climate Change in October 2024, CertainTeed completed a new phase over the summer that will allow the company to provide information for the permitting and detailed design of the Antrim Gypsum Project.

With construction aimed to begin in 2026, the Antrim Gypsum Project will source natural gypsum material locally to supply the Eastern Canadian and Northeast American markets.

By strategically positioning the Antrim Mine in Nova Scotia, Saint-Gobain can significantly reduce transportation miles and Scope 3 carbon emissions, in alignment with the Group’s mission to achieve net-zero carbon by 2050.

About CertainTeed

With innovative building solutions made possible through its comprehensive offering of interior and exterior products, CertainTeed is transforming how the industry builds. As leaders in building science and sustainable construction, CertainTeed makes it easier than ever to create high-performance, energy-efficient places to live, work and play, so that together we can make the world a better home.

A subsidiary of Saint-Gobain, one of the world's largest and oldest building products companies, CertainTeed has more than 6,900 employees and more than 60 manufacturing facilities throughout the United States and Canada. www.certainteed.com

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, celebrating its 360th anniversary in 2025, remains more committed than ever to its purpose “MAKING THE WORLD A BETTER HOME”.

€46.6 billion in sales in 2024

More than 161,000 employees, locations in 80 countries

Committed to achieving net zero carbon emissions by 2050

View source version on businesswire.com:https://www.businesswire.com/news/home/20251014307616/en/

CONTACT: Alexandre Lainesse

Public Relations Manager, Canada, Saint-Gobain North America

[email protected]

514-973-1187

KEYWORD: NORTH AMERICA CANADA

INDUSTRY KEYWORD: CHEMICALS/PLASTICS MINING/MINERALS OTHER CONSTRUCTION & PROPERTY MANUFACTURING NATURAL RESOURCES CONSTRUCTION & PROPERTY OTHER MANUFACTURING

SOURCE: Saint-Gobain

Copyright Business Wire 2025.

PUB: 10/15/2025 01:34 PM/DISC: 10/15/2025 01:34 PM

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