In this article there were mentioned selected design aspects of sections and joints
in low energy buildings. There were set legal requirements in energy saving and
thermal insulation as well as for avoidance of surface and interlayer condensation.
In order to select internal sections and joints which fulfil the requirements for low
energy building, calculations of physical parameters were performed with professional
computer programs. The usage of modern insulating materials and correct set
of material systems in external partitions and their joints guarantees minimal heat
loss through permeating and ensures reaching the low energy building standard.