Building envelope for new buildings and energy renovation of existing buildings

The aim of the project is to stimulate energy savings in new existing buildings and to contribute to the realization of the energy plan Energy 21. The emphasis of the project is on activities that can be used in the development of construction that can fulfil the stronger requirements in the coming regulation BR-2005. The activities are: 1. Systematic analysis of heat loss coefficient and effective heat capacity for the building envelope. 2. In cooporation with Danish organizations and companies as well as international research institutions to develop the scientific basis for a method of optimisation of the building envelope. 3. Development of building envelope constructions that fulfils the requirements of the coming building regulation BR-2005. An analysis of heat loss coefficients has been performed and reported in a PhD.-thesis and has been used in connection with revision of the rules for calculation of thermal loss from buildings. In the project, a method for optimisation of building envelopes has been developed. The method makes it possible to objectively choose insulation thickness for building envelopes based on information on the thermal performance of the constructions, their service life, costs and future development of price of energy and interest rates. Methods for predicting service life and integration of service life and optimisation has been reported in a PhD.-thesis. In cooporation with participating companies and organizations, standard solutions for roof, terrain deck, light weight walls and heavy weight walls have been developed. Seeking an economical neutral solution compared to current conditions (building regulation 1995) results in an increase of insulation thickness for the constructions by more than 50%