Objectives:
- To discover the most essential factors and their effects in regards to the design of low-energy buildings based on previous knowledge and experiences, as well as computational analyses.
- To give recommendations on how to take into account these factors when compiling new energy efficiency regulations.
At the beginning of this project, a group of experts was put together from the professors and experienced researchers of Department of Civil Engineering of Tampere University. They discussed the effects of tightening thermal insulation regulations on the building physical behaviour of structures, and assessed the significance of each factor. In regards to low-energy buildings, the group of experts considered the increase in the cooling demand of a building, the significance of internal convection of structures, the hygrothermal conditions of ventilated roofs and ventilated base floors, the performance and requirements of vapour barriers, heat accumulation of solid built-in frames and how insulation may impact their hygrothermal behaviour, as well as issues related to pressure differences, air leaks and heat bridges. Calculations were done based on the discussions.
The project was financed by Ministry of the Environment.