What is a Deep Renovation Definition?

A huge potential for energy savings lies in the renovation of the existing building stock. It is a prerequisite that these buildings are renovated “deeply” for the building sector to reduce their greenhouse gas (GHG) emissions and meet global energy reduction objectives. The Global Building Performance Network’s (GBPN) mission is to dramatically reduce the energy use of existing buildings and consequently reduce the GHG emissions associated. GBPN facilitates this by following a “deep energy efficiency scenario”. But what is a “deep” renovation? The GBPN convened collaborators on both sides of the Atlantic and around the world in order to formulate coherent definitions. Together we reached a general understanding on the most commonly used expressions: deep renovation and deep retrofit.