Yes! Green roofs can work on both new and old houses and buildings. Furthermore, they can also survive the other types of the installations, such as solar panels and the roof areas left out for recreation. However, it is crucial to know if your roof can sustain the installation of green roofing. There are types of living roofs that are installed in layers, which can be daunting for the roof itself. A professional green roof service can tell you if your roof is suitable or not.