|The Warnock Hersey Mark (WHI)
The Warnock Hersey Mark (WHI) is North America’s leading product safety and performance mark for building and construction products.
Products bearing the WHI Mark indicate compliance to relevant building codes, association criteria, and product safety and performance standards. Nearly 80% of North America's wood fire-rated doors bear the WHI Mark.
Warnock Hersey Labels - click here to download pdf of Five Lakes labels