Our facility undergoes schedule inspections to validate that modifications are done in compliance with the requirements of your Intertek and UL specification listings. All material is analyzed in accordance with NFPA codes and expectations. This remarkably thermally resistant FRP isolator is structurally bonded to Hope’s steel window and door frames http://www.localshq.com/directory/listingdisplay.aspx?lid=21562#.Yb99M8nMLIU