Therma Tru Entry Doors 

Your home is your sanctuary, your showplace and your biggest investment. Selecting a new entry door system, you can rest assure that Therma-Tru entry doors has the right door to meet your needs. With more than 25 years of experience making beautiful fiberglass doors, we can help you create an entryway that is more than just a door.

As the company that invented fiberglass doors, we have the knowledge, experience, and products to bring your vision to life. We want to help you create an entryway that reflects your own sense of style and your everyday life.

Unlike other companies, our entry and patio doors are designed as complete systems. From top to bottom, every aspect is engineered to work together seamlessly. These are just a few reasons why Therma-Tru® Doors is the most preferred brand by building professionals and contractors. They know our doors and components are built to last. Our door systems are also backed up by an outstanding customer support team – there to help you before, during and after your purchase.

We have all the products and services you need to make the door-buying process as easy and convenient as possible. At Therma-Tru® Doors, our goal is to make it easy for you to “Make Your Great Entrance.”


Therma-Tru® Doors have unique features and specifications that give you the very best in exterior doors:

  • Features AccuGrain™ Technology, which gives our Classic-Craft® line of entry doors the genuine, authentic look of traditional wood doors. The process uses multiple dies to produce different graining types to cast the appearance of real wood into our fiberglass doors.
  • High Definition Embossing is a texturing process that creates the looks of wood paneling in steel entry doors with smooth high-pressure moulded panel skins, which is what gives steel doors the look of traditional panel embossed wood doors.
  • Therma-Tru is leading the industry with decorative glass options to make your home stand out, increasing curb appeal, adding light to your entry way, and your own personal touch to a new door.
  • Tru-Defense Door System maximizes the seal between the door and the frame to keep out the damaging effects of wind and rain, increases energy efficiency and are engineered to work together to perform better in all kinds of weather conditions, especially snowy Buffalo winters.
  • Our Thermal Deflection Testing helps Therma-Tru doors stand up to severe weather and temperatures particularly those found in Cheektowaga, West Seneca, and Bowmansville, NY.

Use the Therma-Tru DoorWays app tool to quickly design and visualize the door of your dreams!

Featured Therma-Tru Video

Check out this video below from Therma-Tru. Featuring the Classic-Craft® American Style Collection, Mahogany Collection, Rustic Collection, & Oak Collection of fiberglass door lines.

Purchasing an entry or patio door from Therma-Tru, we can assure you this high quality product was built to last.

We at Big L Windows & Doors care for the safety of you and our community. With efforts to best serve you and our customers during the COVID-19 virus, we are offering free virtual appointments. Request your virtual consultation today to discuss your Therma Tru doors project, and get a free quote.

Get your FREE Virtual Appointment today >>