Cornerstone Building Brands

About Us

Based in Cary, NC, Ply Gem is North America's leading manufacturer of exterior building materials, including windows, siding, stone, and 40 other categories.

At Ply Gem, we provide the nation's residential builders, remodelers, and architects with access to a comprehensive range of building products. From new construction to repair, remodel and replacement, our full line of windows, doors, siding, stone veneer, and fencing products provide quality and value for all types of projects. At Ply Gem, we're all about you – finding out what you need; responding to your questions; helping get the job done right. After all, we don't succeed until you succeed.