We’re shaping the future through a modern approach to industrialism.
About us
Making Sustainability Accessible.
By embracing innovation, sustainability, and precision in manufacturing, we’re redefining industrial standards. Our processes and materials are designed to deliver high performance while reducing environmental impact, making sustainability not just a goal but a reality
Welcome to Greenspan
Redefining Building Materials for the Future
Greenspan is redefining the standards of modern construction with our innovative, high-performance magnesium oxide (MgO) boards. Engineered for durability, versatility, and sustainability, Cemrock products are designed to address the evolving needs of builders, architects, and developers worldwide.
Since our inception, we’ve been dedicated to providing advanced building solutions that outperform traditional materials in strength, fire resistance, and environmental impact. Whether it’s for residential, commercial, or industrial applications, Greenspan is trusted to deliver reliable, efficient, and future-ready materials that set new benchmarks in the construction industry.
At Greenspan, we’re not just building materials—we’re building better, smarter, and more sustainable solutions for tomorrow.
Our History
Pioneering Change, Setting Standards
Founded in 1999 by Mike Cregan, Greenspan was built to revolutionize construction with innovative and sustainable building materials. In 2011, Greenspan introduced the Cemrock Lite board, followed by the Extreme board in 2014—marking the beginning of a new era for MgO products. Years of testing and refinement have led to the high-performance standard we deliver today.
With a commitment to addressing key challenges like fire resistance and water damage, Greenspan has grown to offer a diverse range of solutions, including tile backers, sheathing boards, and structural panels—while staying rooted in sustainability.
Our Mission
Eco-Driven, High-Performance Solutions
At Greenspan, we are dedicated to delivering high-quality, eco-friendly building materials that support sustainable practices and align with environmental goals. We prioritize reducing waste, promoting recycling, and minimizing the construction industry’s environmental impact.
By balancing cost efficiency with environmental stewardship, we strive to deliver solutions that meet the needs of today while building a better future for tomorrow.
Our Vision
Leading Safe, Sustainable Practices
Greenspan is committed to leading the industry with building materials that exceed the highest standards of safety and sustainability. Our vision is to continuously innovate and set new benchmarks for quality, durability, and environmental responsibility.
We aim to be the most trusted provider in the construction industry while fostering a culture of transparency, collaboration, and excellence within our team.
Why Greenspan?
Innovation That Builds the Future
Greenspan products are designed to outperform traditional materials, offering superior fire resistance, water resistance, and unmatched durability. Tested and certified to meet international standards, our Cemrock MgO boards are trusted by builders around the world.
With a legacy of innovation and a commitment to sustainability, Greenspan continues to redefine the future of building materials, delivering smarter and more efficient solutions for every project.