The premise of the project to build Aquaponic systems on rooftops in Cuba is based on the lack of space in the inner cities such as Havana. Like most cities, space is very limited and seldom suited for growing food. At ICAFF, we believe strongly in community food production. One of the many obstacles we faced (and overcame) were the actual rooftops. Built primarily of a clay exterior, the heavy weight of an Aquaponic system (even raft) could present a danger to the structure, even if only the exterior. Fortunately, many of the roofs had a flat cement portion towards the back of the house which nicely accommodated an Aquaponic system.