In this episode of Building Science Digest, we chat with Dennis Wilson, VP, ESG & Managing Director, Circular Economy Solutions North America at Saint-Gobain North America, to unpack one of the most important shifts in sustainable construction: the move from a linear economy to a circular economy.

Dennis explains what the circular economy really means, how it reduces waste, recirculates materials, and helps regenerate nature.

This episode explores how Saint-Gobain is leading the charge through initiatives like recycling glass from skyscrapers into new insulation, cutting CO₂ emissions, and why understanding Scope 1, 2, and 3 emissions is critical to building a truly sustainable future.

Listeners will learn:

• The difference between linear, cradle-to-grave systems and circular, cradle-to-cradle design

• How circular practices create both environmental and economic value

• Real-world examples of material re-use in building products like gypsum and glass

• What contractors, customers, and communities can do to support circularity

• Why data, design, and reverse supply chains are essential to making it work

Whether you are a builder, architect, or sustainability enthusiast, this conversation will give you a clear and practical understanding of how circular economy principles are transforming the built environment and what it means for the future of construction.