Eight Decades of Building the Outer Layer
Cornerstone Building Brands was founded in 1942 with a single manufacturing facility and a straightforward mission: produce durable, well-engineered building products that contractors could rely on. Over the following decades, the company expanded through organic growth and strategic acquisitions, building a portfolio that today encompasses windows, entry doors, patio doors, vinyl siding, and architectural trim systems.
Today, Cornerstone operates 22 manufacturing facilities across North America. Our products are distributed through an established network of regional distributors and building material dealers, reaching every U.S. state and major Canadian provinces. Our workforce of more than 6,000 employees manufactures over 4,000 distinct product SKUs, giving builders the breadth of choice they need to satisfy their customers without managing multiple vendor relationships.
We are not a design brand chasing aesthetic trends. We are a manufacturing company focused on precision, repeatability, and supply chain reliability. Our engineering teams work to tighter tolerances than industry minimums demand, because we know that building products are judged by how they perform — not how they photograph.
