Cornerstone Building Brands, Inc.
ManufacturerUnclaimedExterior building products, windows, siding, doors, and metal panels.
What to check
- Real, operating business · Website live (Jun 2026)
- Delivers what it claims · Certifications verifiable
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About
Cornerstone Building Brands is the largest manufacturer of exterior building products for the North American residential and commercial construction markets, producing vinyl windows and doors, vinyl and metal siding, manufactured stone, metal roofing, and wall panels. The company was formed through the merger of Ply Gem Holdings and NCI Building Systems, and now operates more than 65 manufacturing facilities across the US and Canada. Its portfolio of brands includes Ply Gem, Simonton Windows, Prime Windows, Royal Building Products, and MBCI metal buildings, serving new construction and remodeling channels.
- Primary markets
- 🇺🇸 United States 🇨🇦 Canada
- Certifications (declared)
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