Therma-Tru Doors


It was a bold innovation for the home-building market when we introduced an entryway door that looked as beautiful as wood and was more durable. At Therma-Tru, we have been revolutionizing the industry from the start—a spirit you can continue to expect from the leading entry door brand most preferred by building professionals according to Brand Use Study / 2017 Builder Magazine


Our roots go back to 1962 when David Welles, a retired Owens Corning executive, purchased a bankrupt building supply company in Toledo, Ohio. In 1982, the company launched its Fiber-Classic style, the first fiberglass door on the market, creating a product never seen before: An entryway door that looked as beautiful as wood but with exceptional performance.

In 1985, we opened a 60,000 square-foot plant in Butler, Indiana. Within 10 years, we developed and introduced the Classic-Craft fiberglass door, followed a few years later by our Smooth-Star collection. In 2000, we patented our full door system.

In 2003, Therma-Tru became part of the Fortune Brands Home & Security family. And in September 2009, Therma-Tru and Fypon — the brand name leader in the urethane millwork — merged to bring their complementary products to market together.

Our legacy of innovation continues with a variety of new products designed to meet today's building trends. We are the nation's leading manufacturer of fiberglass and steel exterior door systems, and we are the most preferred brand of entry doors among building professionals (according to Brand Use Study / Builder Magazine). Our attention to detail in styling, including our glass innovations, have brought improved curb appeal and value to our customers' homes, and the security and durability features built into every Therma-Tru door brings home comfort and security.

Select Products we Provide

  • Classic Craft®
  • Fiber-Classic®
  • Smooth-Star®
  • Pulse
  • Profiles™
  • Traditions
  • Steel Edge

Southern Window Supply has one of the broadest product selections in the Birmingham, Alabama area. Our highly trained staff can provide the help you need to obtain the perfect windows, doors, and other items to make your property look outstanding and have great functionality. To get started please use the Contact Us page, or call us directly at (205) 945-9832. We want to help make your project a success.