To qualify for a Warnock Hersey mark, a fire door must comply with local and national codes, requirements and standards as determined by an Intertek inspection or previous certification. The Warnock Hersey mark demonstrates that a product conforms to these standards and that the manufacturer receives ongoing factory inspections.
Standards and codes that specific fire doors must adhere to differ by product. With the Warnock Hersey Listed Product and Code Compliance Directory through Intertek, users can search for products to find the specific standards the product must comply with to receive the Warnock Hersey mark. Users may search by manufacturing company, listing section, CSI code, keyword or standard to find the applicable product.
For a fire door to maintain its certification, it must have a legible label that includes manufacturer information, whether the door or frame is designed to withstand temperature increases, and what duration the door is designed to withstand fire.
If an installed door does not already have a Warnock Hersey mark, Intertek offers field certification appointments to grant certification if the door qualifies post-installation.
Intertek tests, certifies and inspects products to maintain safety and functionality. Its Warnock Hersey Mark appears on products such as fire doors, construction projects, hardware and plumbing.