Therma-Tru Fiberglass Entry Door Systems

Built for Safety & Security

Protect your home and everything in it, from family and pets to valuables and keepsakes. Therma-Tru products are designed for durability and enhanced security with pieces and parts engineered as a complete system.

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Did you know?

On average, a home is burglarized in the U.S. every 45 seconds.1

More than half of home burglaries occur during the daytime.2

How do burglars enter the home?
34% Front Door3
22% Back Door3

Home burglary rates are highest in the summer.4

  1. Source: FBI Uniform Crime Reporting Program, “2019 Crime in the United States.”
  2. Source: FBI Uniform Crime Reporting Program, “2019 Crime in the United States,” Table 7.
  3. Source:
  4. Source: U.S. Department of Justice, Bureau of Justice Statistics, “Seasonal Patterns in Criminal Victimization Trends,” June 2014.

Therma-Tru Fiberglass Door Slab

Therma-Tru’s fiberglass door slabs are up to 30% more resistant to kick-ins than standard steel doors.** Standard steel doors can dent and bow, which leads more quickly to product failure. With durable construction, our fiberglass doors can withstand this impact by absorbing and deflecting the force.

  • Therma-Tru fiberglass doors are built with enhanced lock blocks to help ensure proper handleset reinforcement, combined with lock and hinge stiles that increase rigidity and stability.
  • Therma-Tru fiberglass skins provide durability and long-term performance. A fiberglass door typically will not dent or rust, nor will it warp, split, crack or rot. Wood doors and steel doors may weaken over time with exposure to the elements.

**Comparison of Therma-Tru doors in pendulum impact test: fiberglass versus standard steel.

Ready to secure your home?

Browse our line of fiberglass doors or contact a dealer to learn how you can take advantage of the numerous security features of a Therma-Tru door.

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Therma-Tru Composite Door Frame

More reliable and up to 50% stronger on average than standard wood door frames when withstanding a simulated forced entry attempt by kicking in the door.*

  • Features full-length jambs with no finger joints for more reliable performance, and a continuous composite material that will not deteriorate over time, like wood.
  • Entries with a wooden door frame are more susceptible to being kicked in as compared to a Therma-Tru composite door frame, giving burglars access to your home within seconds.
  • Wood jambs typically have finger joints. These areas where two pieces of wood come together are structurally weaker when compared to a single continuous material that runs the entire length of the jamb.

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*Comparison of pendulum impact test results for Therma-Tru composite door frame and standard finger-jointed Pine wood door frame, both with similar pre-hung doors.

Additional Therma-Tru Security Benefits

Multi-Point Locking System

The Therma-Tru multi-point locking system engages the door frame at three points from top to bottom, whereas traditional deadbolt assemblies only engage at one point.

Therma-Tru Glass

Options feature double- or triple-pane construction and include two panes of tempered glass for enhanced safety and performance.

Adjustable Security Strike Plate

Our adjustable security strike plate wraps around the door jamb and uses 2-½" screws to fully engage the frame of the house for added support and strength against forced entry.