What Is the Warnock Hersey Mark?
Warnock Hersey is an Intertek certification mark used on listed products. In the openings industry, it is commonly associated with fire-rated doors, frames, windows, and related assemblies.
Why It Matters
The mark helps inspectors and project teams verify that a product is listed and traceable through Intertek documentation.
Details
Issuing BodyIntertek
RegionNorth America and international markets
ValidityListing-based; tied to labeled products and tested assemblies