Cornerstone Building Brands | Royal Architectural Institute of Canada

Cornerstone Building Brands

Cornerstone Building Brands is the largest manufacturer of exterior building products by sales for residential and low-rise non-residential buildings in North America. Headquartered in Cary, N.C., we serve residential and commercial customers across the new construction and repair and remodel markets. Our market-leading portfolio of products spans vinyl windows, vinyl siding, stone veneer, metal roofing, metal wall systems and metal accessories. Cornerstone Building Brands’ broad, multichannel distribution platform and expansive national footprint includes more than 20,000 employees at manufacturing, distribution and office locations throughout North America. Corporate stewardship and environmental, social and governance (ESG) responsibility are embedded in our culture. We are committed to contributing positively to the communities where we live, work and play.

For more information, visit us at and our Canadian business websites 

CBB Brochure

For technical support or to discuss booking a Lunch & Learn session or Webinar with one of our brands, please contact:

North Star & PlyGem Canada
Kate Lindsay

Mitten Building Products
Anthony Eberwein

Robertson Buildings
James Austin