Farwest Insulation Contracting is a commercial and mechanical insulation contractor with a dedicated firestopping arm. Its own site states that Farwest is an FM approved firestop application contractor, and it is listed by the Firestop Contractors International Association as an FM 4991 approved firestop contractor. The firestop crew installs tested systems at penetrations and joints with a stated focus on quality control. It serves Southern California and Arizona.