Mitten products are backed by Ply Gem — a 70-year leader in pioneering performance home exteriors, with a superior warranty for exactly the home you want for decades to come.
About Ply Gem Holdings, Inc
Ply Gem, headquartered in Cary, NC, manufactures and sells a variety of products focused on the exterior envelope of single and multi-family homes. Ply Gem’s key products include windows, doors, siding, roofing, metal accessories, stone and other adjacent products. Ply Gem employs approximately 11,600 people across 35 facilities in North America. CD&R acquired Ply Gem in April 2018 and concurrently merged it with Atrium Windows & Doors, a manufacturer of residential windows and doors. For more information, visit
About Ply Gem in Canada
In Canada, Ply Gem is an integrated business solutions provider to the new construction and remodel/replacement marketplace. 
Ply Gem Canada is our industry leading window manufacturing business, headquartered in Calgary, Alberta. Visit for more information.
Ply Gem Building Products manufactures the market-leading Mitten line of vinyl siding and distributes associated Ply Gem and Allied product lines across Canada through 28 company-owned distribution branches. Visit for more information.