Gap Facts

If you’ve spent any time searching for products to make your fire doors with excessive clearances compliant, you know it’s not an easy task. You may have wondered, “Is the product right for my doors? Is it listed? Rated? Tested? Will my AHJ approve?”

Our Gap Facts pages provide straightforward information to help you navigate the codes, learn more about fire testing, and understand the terms surrounding the hardware industry. Here you’ll find information to help you make important decisions regarding your fire doors; fixing them right the first time.

Need more facts? Our products were developed by a fire door expert, so if you’ve got questions, chances are, we’ve got answers! To get the facts, send us a message on our contact page, or call today!

Read more about our gap facts below:

--- All products patent pending in the U.S. and Canada ---

THE CROWN FIRE DOOR STOP SYSTEM IS TESTED AND LISTED WITH UL!

The Crown Fire Door Stop System is UL approved for excessive clearances on wood and steel fire doors.The Crown Fire Door Extension has been UL approved to correct excessive undercuts on wood and steel fire doors. All Crown accessories are fire-rated for up to 90 minutes. Applying these products does not increase or decrease the fire door assembly's existing fire rating.
No other products are UL approved, with a 90-minute rating, specifically for excessive clearances.