Cornerstone Building Brands, Inc. was formed when NCI Building Systems, Inc. merged with Ply Gem Parent, LLC in November 2018; the company is headquartered in Cary, North Carolina. Cornerstone Building Brands is the largest manufacturer of exterior building products in North America servicing the commercial, residential and repair & remodel markets.
Prior to the merger, NCI Building Systems Inc. was one of the largest manufacturers of metal products for the non-residential construction industry in North America. The company provided a broad range of products for repair, retrofit and new construction activities. It operated within three primary business segments: metal coil coating, metal components and engineered building systems.
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