Simonton Windows is facing a class-action lawsuit from a group of homeowners who say the company distributed substandard windows.

The suit was filed on October 17, 2016 in the U.S. District Court for the District of Minnesota against Simonton Building Products LLC, formerly known as Simonton Building Products Inc., and other related companies. It alleges breach of warranty, design defect, failure to warn, fraud, liability, negligence, product liability and unjust enrichment.

According to the complaint, the plaintiffs say the insulated glass windows have shown defects early on, including internal condensation, corrosion of the metallic films and/or improper glass preparation leading to visible finger prints and smudges. The suit says the plaintiffs suffered inconvenience, aggravation, loss of use of their windows and/or other damages.

Reflections, Asure, Prism, Impressions, StormBreaker Plus, ProFinish, DaylightMax, Madeira and Lumera are among the former or current Simonton lines named in the suit.

The plaintiffs also claim that Simonton’s windows contain “multiple discrete design and manufacturing defects and deficiencies,” including lack of edge deletion on the low-e coatings on the windows; lack of dessicant or inadequate dessicant inside the spacer; edge seal defects; and lack of secondary window seals. The plaintiffs also allege that Simonton did not adequately test its windows before selling them to the public.

On its website, Simonton says its “windows and doors are tested to the advanced AAMA Gold Label Certification Program. The Gold Certification is AAMA’s highest level of testing with windows and doors being tested for thermal performance as well as air, water and structural integrity. The standard AAMA silver label only requires thermal testing. Simonton’s Product Development Center is an ATI-certified lab site that enables us to perform thorough, in-house structural and thermal testing. An AAMA gold label certifies that the units assembled on the production lines are using the same process and components as the unit that was tested.”

The plaintiffs are seeking a jury trial.

DWM contacted Simonton for a comment on the lawsuit, but  did not receive a response by press time.


  1. Has this been settled and if so, how was it settled?

    Thank you for your assistance,

    Val Forbes

  2. Has this been settled and if so , how was it settled i’m thinking of buying new hurricaine impact windows i live in florida gulf coast.

  3. I purchased new Simonton windows in July 2021. Because I live in a community where the exterior side of the windows need to be the same color (bronze), the windows had to be painted. At the time I signed the contract, the salesperson never mentioned to me that because the windows would need to be painted, that there was a possibility of overspray. All the windows are oversprayed on the edges. I asked Simonton to redo the window inserts, but they refused to redo the windows stating that the windows are painted within Simonton’s “tolerance guidelines”. Needless to say, I am not happy with how the windows look from the interior and have reported the issue to the BBB.

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