Professional Exterior Home Improvement Services

Thermax Windows provides customers in Sumner County, TN and other areas with first-rate exterior home improvement products and services at reasonable rates. You can count on us to handle any residential project that involves the installation of siding, windows, roofing, and doors. Allow us to transform your home into one of the most beautiful houses in your neighborhood.

What We Offer



The siding products we offer are available in many different styles and colors and are among the best in the industry. What’s more, they all come with a manufacturer’s lifetime warranty. By having our vinyl siding installed by our qualified craftsmen, you can have a virtually maintenance-free way to enhance your home’s appearance from the outside.

New Construction and Replacement Windows

Great-looking windows increase not only a property’s appearance and energy efficiency, but also its resale value. Whether you are a contractor or a homeowner who’s working on a home improvement project, you can rely on us to provide you with the highest quality products and installation.

Our replacement windows are ENERGY STAR-rated and have a lifetime warranty including glass breakage. We also offer both double-pane and triple-pane windows in a variety of styles and colors. Contact us today to schedule a free in-home demonstration!


Garage and Entry Doors

If you are looking for a way to increase your home’s curb appeal, energy rating, and security, we have a solution for you. We sell and install various styles and brands of durable doors.


Entry Doors

High-Performance Garage Doors


Automatic Openers





Your home’s first line of defense against the elements is your roof, so make sure that it is durable and can withstand even the harshest weather conditions. Thermax offers high quality roofing solutions at prices you can afford.



We can build free-standing sun rooms or enclose an existing area to create a year-round or seasonal living space

Get a No-Pressure Quote

All of the products we offer can save you money by improving your home’s energy efficiency. To request a free in-home quote, give us a call today.