ENEA contributed to the INERTIA conference on circularity and sustainability in the construction sector describing its role and experience with a special reference to CONDEREFF. The conference was hosted in Ferrara in September 2019 by the REM TECH EXPO, an international event dedicated to reclamation of contaminated sites, environmental and natural hazards, safety, maintenance and upgrading of the territory, climate changes and circular economy. The main objective of INERTIA was to share knowledge on circular economy in the construction sector.