The WH Mark for Building Product Certification provides safety and performance certification for over 4,000 building and construction products through rigorous testing. Intertek's WH Mark demonstrates a product's commitment to safety, performance, and quality, and that the manufacturer has an approved quality control program and undergoes regular audits. Products that pass applicable standards testing can bear the widely recognized WH Mark from Intertek, which has over 100 years of experience certifying building products.

1. The WH Mark for Building
Product Certification
North America’s leading safety and performance mark.
Intertek’s Warnock Hersey (WH) Mark has long
been the industry preferred certification mark.
Today, Intertek’s WH Mark can be found on more
than 4,000 building and construction products.
Having Intertek’s WH Mark on your product reflects
your commitment to product safety, performance
and quality to inspectors, builders and end users.
The presence of Intertek’s WH Mark also demonstrates that you have
implemented an approved quality control program and are undergoing
quarterly manufacturing plant audits to maintain product consistency.
Once your product has undergone vigorous safety or performance
testing and was determined to be in compliance with the applicable
standards your product will bear Intertek's widely known and accepted
WH Mark.
Trusted Industry Experience
For more than 100 years Intertek has served as the testing, evaluation,
and certification leader for building products and materials.

2. Achieve Faster Time to Market:
When you work with Intertek, you’re guaranteed the knowledge and
operational excellence that only an experienced partner can provide.
We understand that lost time in testing means lost revenue, so we
work closely with you during each step of the process. From an initial
engineering consultation to project planning and final submission,
we’ll ensure your deadlines and time to market goals are being met.
Intertek provides a variety of testing and certification services for your
products including fire testing, physical property testing, structural
testing, and performance testing. What’s more, throughout our global
network of labs we have the ability to test your products to applicable
ANSI, ASTM, CCMC, CSA, EPA, ICBO, ICC-ES, UL, and ULC
standards.
Whether testing to industry requirements, standards or for R&D, our
team will work with you to ensure you are able to reach your target
market quickly and cost effectively.
Leverage Our Wealth of Accreditations:
Intertek is recognized by the world's leading code bodies; as a
Nationally Recognized Testing Laboratory (NRTL) by OSHA;
recognized by Standards Council of Canada (SCC); and A2LA,
APLAC, and ILAC accredited for Asia and other parts of the world.
Our additional accreditations include those by the Standards Council
of Canada (SCC), the National Evaluation Service (NES), the
American National Standards Institute (ANSI) and the International
Code Council - Evaluation Service (ICC-ES).
To learn more about Intertek’s WH Mark, visit us online at www.intertek.com/marks/wh,
email icenter@intertek.com or call 1-800-WORLDLAB.