Windows & Doors

Beautiful windows and doors complete the look of your home, outside and in. Plus, new or replacement windows and doors can increase your home’s value and add energy-efficiency. Whatever your style or budget, we will help you find new or replacement windows to match your family’s needs.

We are proud to carry a wide selection of Marvin® windows and doors, from Marvin’s Signature, Elevate and Essential Collections. We also carry Atrium windows and doors as well as Smarter windows and doors.

If you are looking for high-quality front doors and interior doors, GNH recommends ThermaTru, Simpson, Brosco, Masonite, and Rogue Valley. Speak with our experts today about window placement, style and finish options, door selection, hardware, and much more.

Visit a showroom to explore window and door options, and try them out for yourself.

11513 Route 32
Greenville, NY 12083
Store Hours
M-F: 7am-5pm
Sat: 8am-4pm
Sun: 9am-2pm

Holiday Hours: CLOSED Memorial Day (5/30)
5477 Route 23
Windham, NY 12496
Store Hours
M-F: 7am-5pm
Sat: 8am-2pm
Sun: Closed

Holiday Hours: CLOSED Memorial Day (5/30)
898 New Loudon Road
Latham, NY 12110
Store Hours
M-F: 9am-5pm
Sat: By appointment only
Sun: Closed

Holiday Hours: CLOSED Memorial Day (5/30)

*Early and late hours available by appointment.
Meet the Experts
Alex Vincent
Alex knows the importance of a project done well. Helping clients build out their dream homes relies on many logistical and finer details to take care of, and that’s where she shines! Ask Alex for help planning your project.
Edward Curtin
Ed has been in the building material industry since 1983 with extensive experience as an in-home service technician, production supervisor, and superintendent in charge. Ed assists builders and contractors with a wide range of projects.
Tom Howley
Tom Howley has been in the construction and building supply industry since 1986. He easily coordinates projects with architects, builders, and homeowners alike, from initial design to completed projects.
Dominick Multari
Dominick Multari has been with the GNH Team since January 2008. As our Greenville location Store Manager, his 26 years of experience in the industry and knack for problem-solving make him an asset to customers. Contact him today to get started.
Marvin Signature Collection
Each Marvin window or door is made to order—not retrieved from a warehouse of finished products. It's the industry’s most extensive selection of shapes, styles, sizes and options
Marvin Elevate & Essential Collections
Marvin is the world's largest manufacturer of windows and doors made with Ultrex®—a durable, virtually maintenance free pultruded fiberglass material that outperforms vinyl.
Manufacturing a wide range of high-quality windows & providing exceptional customer service, Atrium has established itself as an efficient manufacturer of high quality products.
Therma-Tru entry door systems are not only the brand that most builders prefer; they are also unmatched with the best warranties in the industry.
Smarter Windows
Smarter vinyl replacement windows have been designed to offer the maximum in energy efficiency. Designed and custom manufactured to fit virtually any opening.
Simpson Doors
Get inspired with Simpson Doors and explore ways to find your perfect door.
Brosco Doors
Brosco is a fourth generation family owned and operated leading distributor of quality doors and millwork.
Rogue Valley Doors
Rogue Valley Doors incorporate quality handcrafted workmanship into each door they design.
Masonite Doors
At Masonite we push ourselves to do more, to protect what matters so you have peace of mind.

How to Measure your Windows and Doors for Replacement

Measuring windows and doors can be a one-person job, but it will go a lot faster with a helper. Read the Full Article on Marvin’s website.

Financing and Credit Application

Tackle those bigger remodeling projects or handle everyday home repairs and maintenance with confidence at GNH. We’re pleased to offer several consumer and commercial credit options to meet your needs, including a traditional cash account, a secure credit card account or an in-house credit account with a 30 day repayment term.

Financing & Credit Options

Helpful Articles

Have you ever considered updating your windows or front door? Are you adding a new deck, and now need to pick out a door to install with it? Browse our articles for more information on the choices available to you.


Request a Quote

Looking for something in particular for a special project? Request a Quote with GNH and one of our representatives will contact you about the special needs of your upcoming project. Complete the form below.

    The Benefits of New Windows

    Are new windows worth the cost? How much value will it add to your home? What are the potential energy efficiency savings?

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