Development and full scale demonstration of concepts for renovation of older apartment blocks to low energy class 1

The project aims to develop and demonstrate concrete solutions for energy rehabilitation of the building envelope, installations and supplies, taking particular account of the architectural and building technical terms for residential buildings built before 1960, corresponding to approx. 600.000 apartments. They were built in masonry with wooden floors and roof constructions until the 1930s when floors progressively were made of concrete. Usually, it is attempted to keep the facades of these buildings unchanged, which is impossible in case ofexternal insulation. Further, the use of wood involves special technical challenges. The developed solutions will be demonstrated in full scale on two demonstration projects, a property from 1896 and one from 1930. The concept development is expected to result in end-to-end solutions with various combinations, technologies and components for building envelope and installations. At the demonstration buildings, the estimated energy savings and other improvements can be compared with the actually achieved and measured improvements. As for one of the demonstration buildings, a study is planned concerning the importance of user behaviour as regards energy consumption and indoor climate. With the ''power of example'', the demonstrating buildings can inspire others to undertake similar renovations and provide a basis for demanding a revision of the Building Regulations. Moreover, experience from the demonstration buildings may identify needs and possibilities of further optimization of the energy concepts for the renovation of old blocks of flats.