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Fenestration Product Testing and Certification

Let us help you achieve the optimal performance of your building envelope components and systems. Our expert staff partner with you to take your product from design to the global market.

Impact cannon testing window - fenestration product testing

Your journey through fenestration product testing

Our mission is to help you, the built environment community, to achieve optimal performance of all your building envelope components and systems. Our experienced and knowledgeable staff understand the science behind the building envelope. We are committed to partnering with you to help you take your product from design conception to the global market. 

Fenestration Testing Services

  • Air permeability
  • CSA Energy Rating (ER)
  • Condensation resistance
  • Impact and pressure-cycling tests
  • Resistance to condensation
  • Resistance to water penetration
  • Resistance to wind driven rain
  • Resistance to wind loads
  • Solar Heat Gain Coefficient (SHGC)
  • Structural resistance
  • Thermal-cycling and physical-cycling
  • Thermal resistance (R-value)
  • Thermal resistance and condensation
  • Thermal transmission (U-factor)
  • Water-vapor permeability
  • Visible Transmittance (VT)

We’ve compiled a few of your most frequently asked questions surrounding fenestration product testing and certification for the building enclosure. Click on the plus sign next to any questions below who's answers you'd like to view. 

General fenestration product design and manufacturing questions

How do I know what standards I need to test my fenestration products to?

Your first resource to understand what standards you should be testing your products to, is to confer with the project’s architect or building owner. These stakeholders should be able to refer you to the proper test standards commonly required by the location your products will be sold. 

In the event that an architect or building owner is not available to you, you may also consult the trusted resources of the Construction Specification Institute (CSI). CSI is dedicated to advancing building information management, communication, and education to improve facility performance.

How do I meet Energy Star Requirements?

Meeting energy efficient product requirements are increasingly becoming a key factor in a customer’s decision-making process and could be the tie breaking factor in a competitive product situation. Energy Star products utilize quality materials that will be durable enough to meet specific performance criteria aimed to meet the climate the product intends to serve. Generally, qualified Energy Star windows, doors, and skylights meet the following criteria: 

To learn more about meeting Energy Star requirements, please visit for additional resources.

How do I choose an accredited laboratory?

When embarking on choosing an accredited testing and certification laboratory, you want to ensure this ally is capable of partnering with you to supply dependable and accurate test results. Aside from technical competence, a few other factors include:

  • Qualified, well trained, knowledgeable staff
  • Proper sampling practices
  • Correct testing procedures
  • Valid test methods
  • State-of-the-art testing facilities
  • Properly calibrated and maintained equipment
  • Quality assurance procedures
  • Accurate recording and reporting procedures

At UL, we take pride in maintaining and ensuring our laboratories and staff have the training and resources to serve our customers.

What fenestration test standards is UL accredited to perform?


We are proud to be accredited to perform a wide variety of test standards. In many cases our knowledge staff has worked with industry associations and experts to help create standards. We test to the leading industry standards, including (but not limited to):

  • AAMA
  • ANSI
  • ASTM
  • BS
  • CSA
  • CWCT
  • ICC 500
  • EN
  • Miami Dade County
  • NAFS
  • NFPA
  • PAS
  • UL

As a reputable 3rd party testing and certification agency, we can help you understand the standards we are accredited to perform in detail.

Regionally specific fenestration product design and manufacturing questions

United States

California: How do I meet Title 24 for California?

California has created an energy code designed to reduce wastefully energy consumption in both new and existing construction. This set of efficiency standards are updated every three years, and can be found at

To learn more about California’s Title 24, Energy Performance Services has created a Title 24 Express page. For additional information on this topic, you can subscribe to Energy Code Work’s Title 24 question of the week.


Florida: How do I meet Florida Building Code for the Florida Product Approval System?

We can help you meet Florida building code for the Florida Project Approval System. To begin this process, follow the outline below.

Texas: How do I get my products listed on the Texas Department of Insurance website?

We can help you get your products listed on the Texas Department of Insurance (TDI) website. To begin this process, follow the outline below.

  1.  Test your products with UL, receive a test report.
  2.  As a manufacturer, you can choose the next phase in your path to getting your product listed with TDI. In all options, you’ll need to submit your UL test report to a 3rd party listed below.
  1.  Next you must request a submission number via email to TDI
  2.  As a final step, submit all information listed below to TDI representative via email to Paul Bove, Ph.D., P.E.
    • Original Submittal Letter with Submittal Number from Paul Bove
    • Test Report
    • Certification Agency Approval Listing
    • Certification Agency Approved Label
    • Installation Instructions

Building Envelope Testing, Commissioning and Advisory Services

Achieve optimal performance for building envelope components and systems with building envelope testing, commissioning and advisory services from UL Solutions' Built Environment experts.

The Journey to Market: Starting Down the Path to Fenestration Product Testing

Fenestration product testing and certification can be a challenging hurdle to overcome, all before your fenestration products enter the market. We can guide you to the right path in your journey to market. 


Get in touch

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