composition of building systems

Heading towards comfortable, energyefficient, climate-friendly and resource-preserving buildings, there are a big number of different and sometimes contradictionary systems on the market. Policy needs consultancy, which of these systems to promote. On behalf of two loer Austraim Authorities the study adressed here explored life cycle costs, green house gas-emissions and primary energy demnd of not less than 30 differen combinations of heatprotection, building-material and building services concept. The outputs of the study are made use of both in policy consultancy and in development of new building products and systems.