Founded over 70 years ago, Ply Gem Windows has become one of the top manufacturers in the United States, specializing mostly with mid-grade windows and doors. They recently acquired Certainteed Windows, Great Lakes Windows, and MW. Like most window brands, their prices vary significantly across different window styles and sizes. They maintain a broad product portfolio, including replacement windows, entry doors, siding, fencing, and stone veneer. They currently have 2.5 stars on Yelp with 11 reviews.

They offer a lifetime limited warranty that is transferable for five years on most of their windows. If any window or door is determined to be defective under the terms of the warranty, Ply Gem Windows will replace or repair then free of charge, including parts and labor. Their warranty does not cover glass breakage on their doors or windows.