The Brand Spotlight Series was created to highlight Zeeland Lumber & Supply Partners who are dedicated to the continuous improvement of their service and quality of materials, as well as investing in innovations that support the construction industry as a whole.

This month’s Brand Spotlight focuses on Zeeland Lumber & Supply partner, Therma-Tru. As you may know, Therma-Tru is a manufacturer of fiberglass and steel exterior door systems. Let’s take a look at what sets Therma-Tru apart in the industry, and makes them a key innovator for construction as a whole. 

Who is Therma-Tru?

Therma-Tru was the first company to bring fiberglass exterior doors to the market back in 1983, and to this day, they remain the nation’s leading manufacturer of both fiberglass and steel exterior doors. The introduction of fiberglass doors revolutionized the way we look at exterior doors and the way we develop doors for exceptional durability, energy efficiency, and appearance. 

Therma-Tru’s dedication to innovation and their focus on continually improving their products are just a few of the reasons we enjoy partnering with Therma-Tru. We’re also proud to supply their doors because we know they’re of exceptional quality, and their extensive product lines ensure that any consumer or builder can get the perfect exterior door, regardless of investment level or style preference.

What Products does Therma-Tru Offer?

Therma-Tru is best known for their fiberglass doors, but they’re also a leading manufacturer of steel exterior door systems as well. Here’s a look at some of the products Therma-Tru offers, from their classic wood-style fiberglass doors to their heavy-duty embossed steel options. 

Fiberglass Doors

Therma-Tru brought fiberglass doors to the market for a reason. Fiberglass does not warp, rot, dent, or rust. And because Therma-Tru fiberglass doors are manufactured with an insulating foam core that provides four times the R-value of wood, their doors are also one of the most energy-efficient options on the market, too. 

With three distinct fiberglass door product lines, Classic-Craft, Fiber-Classic, and Smooth-Star, Therma-Tru has ensured any homeowner can invest in the quality and durability of fiberglass. Ranging from smooth, modern fiberglass doors that can be painted in any color to fiberglass options that mimic the warmth, beauty, and architectural style of wood, Therma-Tru has created a complete line of fiberglass doors to suit any budget and any style. 

Steel Doors

While fiberglass is Therma-Tru’s flagship product, they also manufacture a variety of steel door options as well. Steel is an affordable, durable option for any home, and one of the preferred options for side doors and house-to-garage doors. With two lines of steel exterior doors, Profiles and Traditions, Therma-Tru offers standard embossed and triple-shadowed and 24-gauge panel embossment door options. All Therma-Tru steel doors come ready to paint and in a variety of sizes, for an affordably-priced, durable exterior door solution. 

What Makes Therma-Tru Innovative?

Innovation is at the heart of everything we do here at Zeeland Lumber & Supply. We take great care to choose partners who hold the values of innovation and continuous improvement as high as we do, and Therma-Tru is certainly no exception. Here are just a few of the ways that Therma-Tru is continuing to innovate:

The First and Leading Manufacturer of Fiberglass Exterior Doors

Therma-Tru got its start with a never-before-seen innovation. They were the first to bring fiberglass exterior doors to the market. Theirs was the first door that would not rot, warp, rust, or dent. Unlike wood, it doesn’t need consistent maintenance, either. But Therma-Tru didn’t stop with a basic fiberglass door. They went on to innovate new finishes, like realistic wood characteristics. Even today, Therma-Tru is constantly working to improve their product. Most recently, they’ve been working to develop new, more attractive ways to implement glass panels in fiberglass doors in a way that’s energy-efficient.  

Consistent Investment In Innovation

In addition to Therma-Tru’s history as an innovator, they’re continuing to push that reputation into the future. In 2018, the company invested in and opened a brand new Innovation Center, a 30,000 square-foot-facility that’s dedicated to research and development and discovering new innovations for exterior door systems.

Dedication to Environmental Responsibility

The future of the construction industry rests in our ability to innovate with the environment in mind. Consumers want —  and our environment needs — building practices that minimize the negative impact on the world around us. This is something that Therma-Tru understands and has taken specific steps to improve. A few of the ways Therma-Tru is innovating with the environment in mind include:

  • Energy Efficiency. Therma-Tru’s fiberglass doors are Energy Star compliant, and NFRC certified. This helps homeowners save money on energy bills, and it protects the environment by reducing energy usage. 
  • Recycling. Therma-Tru not only recycles more than 50% of their landfill waste stream at most facilities, but they also use recycled materials like wood chips and plastic bottles for a variety of their products. 
  • Sustainable Forestry. Sustainable building means drawing from natural resources in a sustainable way. Therma-Tru partners with wood suppliers that utilize certification standards like the Sustainable Forest Initiative to ensure that the wood products they use come from managed forests. 


Zeeland Lumber & Supply is a proud supplier of Therma-Tru products. As the leading manufacturer of fiberglass and steel exterior doors, and as a company that continues to invest in innovation and improvement, they’re exactly the type of supplier we love partnering with. Whether you’re looking for a new front door or you’re a contractor hoping to provide your clients with the very best, you simply can’t go wrong with a Therma-Tru door. For information about the Therma-Tru doors we carry, give us a call at 888-772-2119 or stop into one of our local showrooms

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