Top 5 Door and Window Manufacturing Companies in USA

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1. Cornerstone Building Brands

Revenue: $5.5 billion

Cornerstone Building Brands is the largest manufacturer of exterior construction products in the US. Its portfolio in doors and windows is one of the most versatile in North America. The company resulted from the merger between Ply Gem Parent, LLC and NCI Building Systems, Inc in November, 2018. The merged companies officially rebranded to Cornerstone Building Brands in 2019.

It was later acquired by the private equity firm Clayton, Dubilier & Rice in mid-2022 for $5.8 billion. Clayton, Dubilier & Rice already had a stake of 49% in the company, due to the firm’s ownership of Ply Gem. 

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