Thompson Building Materials is a recognized member of Intertek's Certified Machiners Program, allowing them to modify Intertek Certified Fire Doors and Frames as detailed within the applicable Intertek specification listings. Thompson Building Material’s site, 6618 Federal Blvd., Lemon Grove, CA 91945 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.
