Ply Gem Windows and doors are available in a wide variety of styles for replacement, renovation and new construction applications. Each window and door is built with the highest quality materials and craftsmanship to meet the specific needs of each region across Canada. Why Ply Gem? Ply Gem is the trusted provider of vinyl windows and doors for homes across Canada. No other manufacturer produces more windows for more homes. And with a wide range to choose from, there's a Ply Gem window or door that's right for every home. Each is built with the same attention to quality that's been the hallmark of Ply Gem since 1947.