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
Ply Gem (NYSE: PGEM), headquartered in Cary, N.C., is a leading manufacturer of exterior building products in North America.  Ply Gem produces a comprehensive product line of windows and patio doors, vinyl and aluminum siding and accessories, designer accents, cellular PVC trim and mouldings, vinyl fencing and railing, stone veneer and gutterware. Ply Gem employs 9,000 associates across North America. Visit for more information.
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.