Frequently Asked Questions

Frequently Asked Questions

We’re here to help. If you don’t find an answer to your question on this page, please contact your local Therma-Tru dealer. To find a store near you, visit our Find a Dealer page. You can also call us toll-free at 1-800-THERMA-TRU (800-843-7628), Monday–Friday, 8 a.m.–6 p.m. Eastern Time, or email us at customersupport@thermatru.com.


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General

Therma-Tru Doors

How can I get pricing on a door? You can contact your local Therma-Tru dealer to request a quote.

What are the advantages of fiberglass over wood and steel? A Therma-Tru fiberglass door looks like wood. But it won’t warp or rot like wood, or dent or rust like steel. And the inside is filled with an exceptional heat- and cold-resistant material that helps keep your home warm in winter and cool in summer.

What types of fiberglass doors do you offer? We offer endless choices in fiberglass door styles and handcrafted decorative glass to suit your home style and budget. Browse the many Classic-Craft, Fiber-Classic and Smooth-Star fiberglass door selections on our Entry Doors page.

What is the foam inside Therma-Tru doors and sidelites? The foam inside standard Therma-Tru doors and sidelites is made of polyurethane, one of the most energy-efficient door materials available today. Our Fire and Noise Reduction doors are filled with a different material.

Do you offer French doors? Yes. French, or double, door systems are available in both our entry and patio door lines.

Do you offer French doors with sidelites? Yes. For product availability, contact your local Therma-Tru dealer.

What is the height of a Classic-Craft door only? The standard heights offered by Therma-Tru are: 6’8” (79.25” / 2012.95 mm) and 8’0” (95.25” / 2343.15 mm). However, sizing may vary by region. For more information, contact your local Therma-Tru dealer.

Do you offer a sidelite bigger than 14” width? Therma-Tru offers a variety of sizes in our door lines that can be assembled as a sidelite. For product availability, contact your local Therma-Tru dealer.

Do you offer CAD files for your products? No. However, you can find files that are compatible with CAD in our Line Art directory.



Installation, Finishing, & Maintenance

How do I install a Therma-Tru entry or patio door system? Our installation instructions and videos can be found on our Installation Instructions page.

What are the rough opening dimensions for Therma-Tru door systems? These dimensions can be found in the Architectural Details manual on our website. Choose Dimensional Details – Book Size or Dimensional Details – U1 Revised, as appropriate. Sizing can vary by region. For more information, contact your local Therma-Tru dealer.

Can I cut the height of my door? No. We do not recommend making on-site modifications. For more information, contact your local Therma-Tru dealer.

Can I have a storm door? Yes. However, Therma-Tru is not responsible for any failure of, or any damage caused to, the storm door or any damage caused to your Therma-Tru door as a result of the storm door.

How do I install a storm door if my sidelite mullion is set back too far? Therma-Tru offers a storm door adapter kit. This will build out the mull post that separates the door and sidelites. For product availability, contact your local Therma-Tru dealer.

Can I have a pet door? Yes. Your local Therma-Tru dealer can order your Therma-Tru door system with a pet door opening. You will need to provide your dealer with a template. And the pet door must have a water-resistant inner sleeve to protect the core of the door.

Can I have a peep sight or mail slot? Yes. Your local Therma-Tru dealer can order your Therma-Tru door system with a peep sight or mail slot opening. You will need to provide your dealer with a template. And the peep sight or mail slot must have a water-resistant inner sleeve to protect the core of the door.

How do I install a peep sight or mail slot in a Therma-Tru door? To install a peep sight or mail slot safely, it must have a water-resistant inner sleeve to protect the core of the door. Refer to the peep sight or mail slot manufacturer’s instructions. Or call us toll-free at 1-800-THERMA-TRU (843-7628), Monday–Friday, 8 a.m.–6 p.m. Eastern Time, or email us at customersupport@thermatru.com.

Can I hang a window treatment on my door? No. We do not recommend drilling into the fiberglass door. However, if you choose to use an exterior window treatment, you will need to attach the window treatment with a pass-through bolt and a finish ring or washer.

How do I install a door knocker on a Therma-Tru door? To install a door knocker safely, you will need to attach the knocker with a pass-through bolt and a finish ring or washer.



Troubleshooting

Are there troubleshooting instructions for Therma-Tru door systems? Yes. We offer troubleshooting instructions and a video on our Installation Instructions page.

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