From idea to installation and even years after – Windows & Doors By Brownell is here with you every step of the way! We believe in quality products, superb customer service, and encourage consumers to stop and learn about windows and doors before they purchase, so that they can make an educated decision before buying.

Here we have information for first-time window buyers, seasoned window pros, and existing customers who are looking for more information about the products they have. If you have any questions, please contact us.

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Purchasing New Windows Or Doors? START HERE :

Windows 101: The Basics

We believe it is essential in educating customers about all aspects of windows and doors. We want all customers to understand their options and which products are best for their individual situation.

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Why Marvin?

At Windows & Doors By Brownell we are 100% committed to the sales and installation of the Marvin Brand Family of Products. Learn about Marvin’s story and about the products that we stand behind.

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Replacement And Installation

We offer free in-home window replacement consultations! Marvin window and door replacement and installations serving Vermont, the Upper Valley and the parts of the North Country.

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Visit Our Showroom Locations

View our extensive Marvin window and door showrooms located in Williston, VT, West Lebanon, NH and Plattsburgh, NY. Browsing from home? Make sure to take a virtual showroom tour!

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Our trusted and premium quality manufacturers

Marvin Windows & Doors

Marvin creates windows and doors inspired by how people live. Explore our product lines and enhance your new construction, remodel or replacement project.

Infinity Windows & Doors

Infinity Ultrex fiberglass replacement windows & doors replicate the look of traditional wood while providing modern features & low-maintenance performance.

TruStile Interior Doors

Manufacturer of high-quality, interior and exterior, MDF, wood and glass doors for residential and commercial use.

Therma Tru Doors

Discover the inspired wide selection of Therma Tru Fiberglass exterior front entrance doors for your home. Beautifully crafted and energy efficient.

Simpson Wood Doors

Simpson Door has built handcrafted solid wood doors since 1912, offering a variety of wood species exterior door choices, from modern front doors to custom doors.

For Marvin Existing Customers

Marvin Care and Maintenance

Regular care and maintenance will help keep your Marvin windows and doors operating smoothly. Find tips and information on how to care for your Marvin products from Windows & Doors By Brownell.

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Service Department

We have a dedicated Service Team of dedicated and experienced Marvin professionals. They are here to ensure product performance over the lifetime of your windows and doors.

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Warranty And Parts

Your Marvin windows and doors have an extensive warranty and will most likely remain good far past when the warranty expires. However, from time-to-time there are product defects. Learn about them here.

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Brownell Quick-Fix Videos

We are here to help even after the purchase of your new windows and doors. Browse our gallery of Brownell Quick-Fix videos to better understand, troubleshoot and service your existing Marvin Windows and Doors.

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