National Millwork   1-508-261-MILL (6455)

Therma-Tru Fiberglass and Steel Fire Doors

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Therma-Tru Profiles Interior Fire Door

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For the indoors, Therma-Tru offers fire-rated fiberglass doors that provide up to 20 minutes of fire protection (when used with steel split-jamb frames. They are more impact-resistant than wood doors, and are made for entry to your garage, basement, utility room, and wherever else you may need fire protection.

You’ll have peace of mind and confidence knowing that you are providing your family with real safety—and you won’t have to sacrifice style as these doors have the same great looks you’ve come to expect from Therma-Tru fiberglass entry doors, as they are available in select door designs within their Classic-Craft, Fiber-Classic, and Smooth-Star collections. Therma-Tru also offers fire-rated steel doors afford you up to 90 minutes of fire protection.

Learn more about Therma-Tru doors on our eShowroom.


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National Millwork is a division of National Lumber Company, supplying the building industry since 1934.