Abstract
The high demand for energy-efficiency of buildings nowadays has triggered the need for gathering documentation on existing construction conditions. This information is then used to design buildings with high consideration to the site or to allow the renovation of old buildings that can no longer meet the requirements for energy performance or comfortable living. The documentation required for this type of situation is often outdated or missing, and to create an optimal design the existing conditions need to be registered and analysed using advanced technological methods, such as Building Information Modelling (BIM) and 3D laser scanning.