In the framework of the cooperation between CTU UCEEB and EXCON, a pilot family house based on a steel skeleton frame combined with panels with high thermal and diffusion resistance was developed. The main advantage of this construction is its very fast assembly and the possibility of a completely open interior space. In particular, our task was to optimize layers, especially of the envelope structures and their joints in terms of their hygrothermal, fire and acoustic properties. For the evaluation of the real behaviour of the pilot house, hygrothermal sensors from MoistureGuard company were installed into the structures.
A seemingly simple task turned into a complex discussion of many disciplines seeking mutual agreement, especially on the properties of the envelope structures. These consist of a solid steel skeleton sheathed with panels with high thermal and diffusion resistance. Therefore, internal layers of envelope structures had to provide, except the visual function, also a fire protection of steel elements, meet the acoustic requirements and provide safe thermal and moisture behaviour of the structure. Due to the highly air- and vapour-tight outer skin, there was a need to minimise the transport of water vapour into the structure, as well as to ensure drying from wet processes outside thee structure. In contrast, diffusion bridges to exterior were carefully designed usually near the joints of structures allowing possible moisture to escape.
The pilot house is now nearing completion. Airtightness (the blowerdoor test) and acoustic measurements will still be soon carried out. In addition, temperature and humidity sensors are being installed to help analyse the actual behaviour of the building compared to the calculations. Two more houses based on this innovative solution are already in the pipeline.