Warranty and Parts

Warranty Information

Marvin windows and doors are covered by a limited warranty guaranteeing they’ll remain free from defects in manufacturing, materials, and workmanship for up to 10 years from the purchase date. Marvin also offers a 20-year warranty on their insulating glass, protecting it against visible obstruction caused by a failure of the insulating glass air seal.

Windows & Doors By Brownell includes a 2 year Workmanship Warranty on installation services and prefinishing completed by the company’s staff. All Marvin products will be installed in compliance with Marvin’s installation instructions and applicable building codes. The warranty extends to the owner of the residence in which the products are originally installed and is nontransferable.

Warranty From Manufacturers

Warranty: 20 years on glass; 10 Years on window parts and pieces

Learn more >> Marvin.com/Warranty


Please see the links below for information directly from Therma-Tru:



Also, contact your installer for installation warranties

Warranty: Contact Your Installer / See Velux Warranty

Learn More >> VeluxUSA.com/Warranty

Warranty: Lifetime Warranty* (* for as long as the original purchaser owns the hardware)

Learn More >> Baldwin.com/Warranty

Do you have a service problem with a product purchased from Windows & Doors By Brownell?


At Windows & Doors By Brownell we keep an extensive stock of the most commonly needed Marvin parts at our Williston location. These include items such as weather-stripping, crank handles and screen pins. Stock parts can be shipped to our West Lebanon or Plattsburgh location in a matter of days. Non stock parts can be ordered and generally take 3 to 4 weeks to arrive.