Innovative flat roof solutions for existing buildings: from energy efficiency to impacts mitigation

In order to reduce climate change and energy waste, due to the harmful impact on the environment, some Northern European countries have adopted standards to make compulsory the use of flat roof technological solutions with energy dynamic behaviour (e.g. in Germany approximately 35% of all cities have integrated green roofs as part of their regulation). Instead, in most Mediterranean area, there is not any regulation about these issues and then it is necessary to carry out comparative studies of adaptive roof solutions that are able to mitigate especially the overheating in summer conditions. Through software simulations and data comparison it will be analyzed the possible uses of innovative materials (PCMs, aerogel, materials for green and cool roof) in relation to hygro-thermal and environmental performance and to resilience levels against the rising risks of climate change impacts. Moreover, it will be examined a case study of a historic existing building in a Southern Italian town.