Do you offer free in-home estimates for window or door replacement?

Yes! We provide completely free, no-obligation in-home estimates for all potential customers. During the visit, our team will assess your needs, answer questions, and provide a written quote with our best pricing—no pressure, no gimmicks. The consultation typically takes less than an hour, and we'll help you understand all your options clearly.

What types of windows do you install, and can they be customized?

We install a full range of custom replacement windows, including double hung, sliding, casement, awning, picture, bay & bow, garden windows, and specialty-shaped windows. Each product is made to order, meaning you can choose the size, grid style, glass type, and color to match your home's style and energy efficiency needs.

Are your windows energy-efficient and backed by a warranty?

Absolutely. Our windows are built with ENERGY STAR® certified Low-E glass, argon gas insulation, and fusion-welded frames to maximize thermal performance. Every window comes with a Limited Lifetime Warranty, covering materials, manufacturing defects, and even accidental glass breakage—giving you peace of mind for years to come.

Do you install entry and patio doors, or just windows?

Yes, in addition to windows, we also install high-quality entry doors, sliding glass patio doors, and French doors. These doors are energy-efficient, secure, and customizable to match your exterior. Whether you're upgrading curb appeal or improving insulation, we'll help you choose the right option for your home.

What areas do you serve in the Tri-Cities region?

We proudly serve Kingsport, Johnson City, Bristol, and surrounding areas in Northeast Tennessee and Southwest Virginia. As a locally owned and operated business, we understand the unique climate and housing needs in the Tri-Cities region and provide personalized service with fast response times.

The Window Source About Our Company | The Window Source of the Tri-Cities

[ Our Story ]

About Us

The Window Source is a network of carefully selected independently owned and operated entrepreneurs backed by a national brand. The Window Source believes that local family-owned businesses, supported by industry leaders with more than 40 years of operating experience, are an ideal combination for a company that values providing high-quality customer service, exterior home-improvement products at the best prices possible. Read our review at various locations across the country and see what your neighbors and others are saying about The Window Source!

Peace of Mind Assurances:

Lifetime Warranty

All Window Source products come with a limited lifetime warranty. You will have peace of mind knowing that you will only make this investment in your home once. Ask your window consultant for details.

About the Window Source of the Tri-Cities

Independently Certified NFRC Labels

Be assured that you will gain valuable energy savings when you choose our High Performance Glass option. All of our products ordered with High Performance Glass will meet ENERGY STAR® guidelines in all US climate zones.

All Window Source products come with voluntary National Fenestration Rating Council (NFRC) labels so that you can compare with confidence. You can rely on the labels and forget about all the sales gimmicks that you may hear from companies charging much higher prices. In fact, the US EPA relies on NFRC data to set its ENERGY STAR guidelines.

ENERGY STAR® Rated Products

No other source gives you such peace of mind and ease when choosing new windows for your home. Join our growing family of satisfied customers at The Window Source where America shops for windows and doors.

Get In Touch

[ Reviews ]

HEAR FROM OUR TRI-CITY CLIENTS

Karin H.

We found The Window Source via a radio advertisement for a home show, and are thrilled that we did. They do actual window conversions in mobile homes so we no longer have old ugly windows with cheesy frames; instead they are now beautiful windows with real frames and sills. The Window Source gave us the best quote…
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Randall F.

I recently had replacement windows and Alside Ascend siding put on my house by The Window Source and they look fantastic. The large arch window they installed is nothing short of stunning. Daniel and Blake Mullin, a father & son team, installed the windows. Their work ethics and craftsmanship are something you just don't see much of nowadays...

Cory H.

One of the best home improvement projects I've had done. Communicative, On time, Professional, Polite, Cleanly, Attentive.Answered all questions and informed me of proper use of windows and features. This is coming from a guy who has done similar service/home improvement work and I'd be ecstatic to know I'm getting Shawn and Trent...

Heidi R.

The Window Source did such a beautiful job! From scheduling the appointment with Julie, to meeting with David the salesman and Dan & Blake the installers, it was nothing but excellence & professionalism! Dan & Blake finished the installation faster than scheduled & made sure everything was clean & tidy at the end of the day. What a great team they...

Karen G.

The entire team from The Window Source of Tri Cities was amazing to work with. Gina & Sheila in the office, Justin Fender ( design consultant) , Joe & Justin ( installers)! From start to finish communication, pricing, product & installation processes were explained thoroughly. The windows are wonderful! I love the screens...

Louise N.

We had a great experience with The Window Source of the Tri-Cities. They replaced a double-hung window with a picture window and wrapped 7 windows altogether. Justin did a great job walking us through our options, and Gina was super-helpful setting up appointments and keeping us updated on our order. Sean and Trenton arrived...

Judy A.

We have window 2 times now & will use again next year! Our experience has been great especially with the men who install! They are genuinely good people, Does excellent work! Shawn has been here 2 times for install & this last time Trenton was here , also a great guy! Shawn pays attention to detail & doesn't rush through a project. Our salesman David has...

Stephen L.

Shawn and Trenton came out today and installed my storm door. They did an awesome job. They were very professional and got the job done in a timely manner. They cleaned up before they left and I couldn’t be happier. I would 100% recommend Shaw, Trenton and of course, The Window Source!
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Andrea H.

Shawn & Trenton W. installed sliding glass doors on my balcony & I couldn't be more pleased with the outcome! They were a professional, courteous team that greeted me with smiles & even informed me of what to expect during the process. I am so happy with the install, the doors & thankful my sister chose The Window Source for this job!

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[ OUR SERVICE AREA ]

Serving Southwest Virginia and Northeast Tennessee including the Tri-Cities

As homeowners, it can be difficult to find the right company for patio doors, double-hung windows, siding and more. The Window Source has been a trusted supplier around America. Our experts will help you pick the right option to meet your needs and ensure that your home improvements will make the neighbors stop to take a look.

We help homeowners with new and replacement windows, patio doors, siding, entry doors and more. We offer a variety of styles, colors and options to meet your needs.The best way to get the process started is through our free estimate. Let’s schedule a time for an in-home demonstration and free estimate.

One of our estimators will look at the proposed project and talk to you about your wants and needs. It’s important for us to meet your expectations and the first step to success is an estimate.