Existing reinforced concrete buildings designed with old code provisions in the Mediterranean area commonly have poor seismic performance. This is due to the lack of proper seismic detailing which is triggering premature brittle failures. Field observations in the aftermath of major seismic events showed that the shear failure of beam-column joint is one of the major weakness of existing RC buildings. In this context, experimental tests demonstrated that fiber reinforced polymers (FRP) systems are effective in increasing the shear strength of beam-column joints and improving the global building performance. More recently, the development of high performance fiber reinforcing cement composites (FRCC) opened to new frontiers in the seismic retrofit of structural members. This paper deals with the seismic strengthening of a real existing building damaged by the L’Aquila earthquake. The seismic performance of the structural system are limited by the shear failure of beam-column joints. To increase its the seismic capacity two different retrofit solutions by using classic FRP systems and a novel FRCC thin jacketing are proposed and compared. A novel design procedure to define the required thickness of the FRCC jacketing of the joint panel is proposed and experimentally validated.