Lee Systems 7, Inc. was founded in 1997 to perform work on new and remodeled commercial projects in several architectural Division 7 sections. Since 2000 Lee Systems 7, Inc. has developed into a full service firestopping company, specializing in Penetration Firestopping, Fire-Resistive Joint Systems and Architectural sealant installation. Lee Systems 7, Inc. has been a member of the Firestop Contractors International Association since 2010. We employ manufacturer certified installers of Specifie