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.


General     -     Finishing     -     Patio Doors     -     Warranties     -    Building Codes    -    

Tru-Defense™     -     Glass     -     Multi-Point Lock     -     Components


Building Codes

January 2013 – The U.S. Building Codes (I Codes) are revised every three years. Various states and jurisdictions may not adopt or be enforcing the most recent versions of these building codes. Therma-Tru product approvals are updated and revised as necessary to meet the changing building codes. Therma-Tru product approvals are also continuously improved or added to as new products are introduced. THE FOLLOWING INFORMATION IS PROVIDED FOR GENERAL INFORMATION ONLY. THERMA-TRU MAKES NO CLAIM, SPECIFIC OR IMPLIED, THAT THE FOLLOWING INFORMATION IS CORRECT OR ACCURATE FOR YOUR STATE OR LOCAL JURISDICTION. ALWAYS CONSULT YOUR BUILDER, CONTRACTOR, ENGINEER, ARCHITECT AND YOUR LOCAL BUILDING CODE OFFICE TO ENSURE THAT YOUR THERMA-TRU DOOR SYSTEM MEETS ALL OF THE BUILDING CODE AND PRODUCT APPROVAL REQUIREMENTS IN YOUR JURISDICTION.



General

Do all local jurisdictions have the same building codes? No. To learn what the local building code requirements are where you live, you need to contact your local building code office.

Are there specific building code requirements for the West Coast? Yes. To learn what they are, you need to contact your local building code office.

I need a Fire door. What fire rating do I need? Fire door ratings can vary by state, jurisdiction and application. To answer this question, you need to contact your local building code office.

Do you offer Noise Reduction patio doors for higher Sound Transmission Class (STC) ratings? Yes. Therma-Tru offers a variety of Noise Reduction doors with higher STC ratings that can be ordered in a hinged patio door system. For product availability, contact your local Therma-Tru dealer.

Where can I find R-Values for Therma-Tru doors? The U-Values of all Therma-Tru doors and glazing can be found on our Performance Data page. Locate the U-Value of your product. Then divide 1 by the U-Value to determine your product’s R-value. (1 ÷ U-Value = R-Value)

What are the building code requirements for water infiltration? There are no mandatory building code requirements in the U.S. for water infiltration for side hinged doors. The only exception is in Miami Dade and Broward counties in Florida, where water infiltration is required to be 15% of the structural design pressure.

Can I get a Therma-Tru public access sill that meets a 2.86-psf water infiltration? No.



Costal Area Codes & Wind Zones

What are the building code requirements for water infiltration in coastal area applications? The only jurisdictions with a building code requirement for water infiltration are Miami Dade and Broward counties in Florida. Miami Dade and Broward counties’ requirement for water infiltration is 15% of the structural design pressure.

Have the building codes for coastal areas changed in recent years? The building codes change every three years. However, the individual states or jurisdictions within the coastal areas may or may not have adopted the most current building codes. It is your responsibility, in conjunction with your builder, contractor, engineer and / or architect to contact your local building code office to ensure that the Therma-Tru door you have purchased complies with all applicable building codes for your area.

I need a door for a 130, 140, 150 mph wind zone. Does Therma-Tru have a system to fit my need? Yes. However, door systems are rated by design pressure (DP), not wind speed. Your builder, contractor, engineer and / or architect is responsible for and should be able to supply you with the DP ratings required for your door system.

What locks are required in a Therma-Tru door system to meet the coastal area building codes product approval? The approved locks for coastal areas are listed on the Therma-Tru product approval. However, your local building code inspector may allow a different lock(s) that it considers to be equivalent to the listed locks to be used. As always, we recommend that you check with your local building code office for guidance.

Can I use a full mortise lock and keep the structural product approval for a coastal area application? No.

Can I use an ANSI T-strike plate and keep the structural product approval for a coastal area application? Your local building code inspector may allow equivalent strike plates to be used. As always, we recommend that you check with your local building code office for guidance.

How do I attach the door frames to my house in a coastal area? The installation instructions in the Therma-Tru product approvals show how the frames are to be attached to a home.

Are Therma-Tru transoms DP-rated? There are DP ratings for select door systems with transoms, which can be found in the Therma-Tru product approvals.

Who determines the DP rating required for the door on my house? The DP rating required for your door is determined by your builder, contractor, engineer, architect and local building code office.

I am buying my Therma-Tru door through a big box retailer and am told I need a DP-rating certificate. What is a DP-rating certificate, and do you supply them? A DP-rating certificate is another way term for product approval. However, it is your responsibility to make sure that the Therma-Tru product approval is acceptable to your local building code office. Requirements vary by state and jurisdiction.

Can I cut my door down in height and keep the DP structural performance rating in the product approval? No.

Can I put a mail slot in my door and keep the DP structural performance rating in the product approval? No, because a mail slot will weaken the door’s structural strength.

Can I put a peep site in my door and keep the DP structural performance rating in the product approval? Yes.



Impact-Rated Products

What is the solar heat gain coefficient (SHGC) of my Therma-Tru Impact-rated glass? The SHGC for all Therma-Tru doors and glazing can be found on our Performance Data page.

What is the U-value of my Therma-Tru Impact-rated door? The U-Value for all Therma-Tru doors and glazing can be found on our Performance Data page.

What are the Sound Transmission Class (STC) ratings for your Impact-rated doors and glass? The STC for all Therma-Tru doors and glazing can be found on our Performance Data page.

Can a homeowner get an insurance rate reduction for using an Impact-rated door system? Some insurance companies offer a reduction in premium for use of Impact-rated door systems or products. Contact your insurance provider for the answer to this question.

What do I need to provide my insurance company? This question can be answered by your insurance provider.

How can I tell if my door and glass are Impact-rated? Impact-rated glass and HVHZ (High Velocity Hurricane Zone) Impact-rated doors have special labels on them. The Impact-rated glass will have a “LAMI” watermark on the glass. The HVHZ Impact-rated door will have an “Impact” label on the hinge side of the door. (This label should never be removed, painted or stained over.) It is your responsibility to make sure the door system you purchased has the necessary DP rating, product approval or certification to meet your local building code requirements. As always, we recommend that you check with your local building code office for guidance.

Which glass designs are available as Impact-rated glass? Therma-Tru offers a variety of Impact-rated glass designs. For product availability, contact your local Therma-Tru dealer. 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.

If I use Therma-Tru Impact-rated glass, does that mean my glass will not break when debris hits it? No. It means the Impact-rated glass unit is made with two panes of glass that will work together. The first pane, which is tempered, will break into small pieces. The second pane, which is laminated, will help prevent debris from penetrating into the home.

Do you offer an Impact-rated door with non-Impact-rated glass? No. When an Impact-rated door is required by local building code, the glass must also be Impact-rated.

Does Therma-Tru sell Impact-rated Fire doors? Yes. Select Therma-Tru steel Fire-rated doors are also Impact-rated. You can view the current Therma-Tru Fire- and Impact-rated product approvals on our website.

Can I use both shutters and Impact-rated door systems on my house? Yes, although, the building code does not require both. As always, we recommend that you check with your local building code office for guidance.

What are the warranties on Therma-Tru Impact-rated doors? The warranties for Therma-Tru Impact-rated doors are the same warranties as non-Impact-rated doors. For current warranties, visit our Warranties page. For previous warranties, visit our Warranties Library here.



Florida Product Approvals

Where can I view Florida Statewide Product Approvals for Therma-Tru door systems? You can view the current Therma-Tru Florida Statewide Approvals on our Product Approvals page. Or you can visit the Florida Building Commission website at www.floridabuilding.org and go to the Product Approval page.

My door system has a Therma-Tru door and a sill from a different manufacturer. Can I use the Florida Statewide Approval for my door system? No. The Florida Statewide Approvals received by Therma-Tru were based upon testing performed on door systems that were constructed using only Therma-Tru products. If your door system was built using components from another manufacturer, then a Therma-Tru Florida Statewide Approval may not apply to your door system.

Do your fiberglass sidelites meet the HVHZ (High Velocity Hurricane Zone) requirements in Florida? Select fiberglass sidelite sizes and styles in the Fiber-Classic and Smooth-Star door lines meet the HVHZ requirements. You can view the current Therma-Tru Florida Statewide Approvals on our Product Approvals page.

Can you give me the Florida product approval I need for my door system? It is your responsibility, in conjunction with your builder, contractor, engineer and / or architect to contact your local building code office to ensure that the Therma-Tru door you purchased complies with all applicable building codes for your area.

Will my dealer or installer know which Florida product approval I need? You will need to contact your dealer or installer to verify if they are familiar with the Florida building codes. As always, we recommend that you check with your builder, contractor, engineer, architect and local building code office for guidance.

I need help finding the correct Florida building code? We recommend that you work with your builder, contractor, engineer, architect and local building code office for guidance.

Are the design pressure (DP) ratings listed on your Florida product approvals? Yes. The DP ratings are listed on the first page of the installation instructions for each of the Florida Statewide Approvals on our Product Approvals page.

I live in Florida and need to know if my Therma-Tru double entry door system with a multi-point locking system (MPLS) has a product approval code. It is your responsibility, in conjunction with your builder, contractor, engineer and / or architect to contact your local building code office to ensure that the Therma-Tru door you purchased complies with all applicable building codes for your area.

What is a Notice of Acceptance (NOA)? Can I still get one? Some jurisdictions, mainly those in the HVHZ (High Velocity Hurricane Zone) of Miami Dade County, used to require an NOA. However, since the implementation of the Florida Statewide Product Approval System, NOAs are no longer required and Therma-Tru no longer provides them. 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, to receive a copy of the Florida State Memorandum to this effect.



Texas Product Approvals

Do your fiberglass sidelites meet the Texas Department of Insurance Approval requirements? Depending on the location of the home: Inland I, Inland II or Seaward, select Therma-Tru fiberglass sidelites meet the Texas Department of Insurance Approval requirements. You can view the current Therma-Tru Texas Department of Insurance Approvals on our Product Approvals page.

Energy Star Partner
#ThermaTru ©2015 Therma-Tru Corp. | All rights reserved.