Abstract
The presentation focuses on investigating the possibility of using concrete as the main construction element in a building envelope of a low energy building. the presentation gives a description of a concept developed by Norut in cooperation with B&E senteret. Earlier studies have shown that the binders through the insulation layers reduces the energy performance of the concrete elements. By arranging the constructive and insulating layers into separate homogenous layers, the energy performance becomes less sensitive regarding the binders.