Liberty Door & Window, LLC. is a recognized member of Intertek's Certified Machiner Program, allowing them to modify Intertek Certified Fire Doors and Frames as detailed within the applicable Intertek specification listings. Liberty Door & Window, LLC.'s site at 11006 NE 37th Circle, Ste 100, Vancouver, WA 98682 is subject to routine inspections to verify that modifications to Intertek Certified Fire Doors and Frames are done in compliance with the requirements of the Intertek specification listings.