Presented article deals with sound insulation properties of timber structures' envelope walls. Particularly, the influence of heavy board ventilated façade on laboratory airborne sound insulation R and Rw in dB was studied. The installation method and gaps between façade boards can cause building defects originating in overrating the influence of ventilated cladding on envelope wall acoustic parameters. Real constructions were built for the experimental purposes and measurements, one with gaps between boards and one with simply eliminated gaps for mutual comparison. The results obtained were processed to make tables and graphs and to derive recommendations for the design of this type of constructions involving the general installation method of façade boards. Detailed results are depicted in conclusions.

The article points out and describes in detail the basic thermal bridges in contact thermal insulation systems and in ventilated facades. Thermal bridges are illustrated by means of thermal images of spot thermal bridges and the calculation of spot heat transfer coefficients.

The issue of complex regeneration of old pre-cast concrete apartment buildings is still a current task of everyday construction practice in the Czech Republic. When designing a new thermal insulation for the envelope of these buildings, we often encounter with critical assembly details. The correct solution of these details requires a detailed assessment in terms of the requirements of thermal protection of buildings. A correct assessment of these critical details is often very challenging and the ordinary designer is virtually unable to do it himself. This paper presents a practical and theoretical example of the design, solution and assessment of additional insulation of loggia loadbearing structures. Using the Ansys software platform, the critical details in 3D were designed and the influence of new thermal insulation on removal of the building defects was assessed. In conclusion, several proposals for possible rehabilitations and their expected efficiency were summarized.

Thermal insulation is an integral part of almost all modern buildings. An important aspect in this process is the elimination of thermal bridges and insulation of all structures which are exposed to adverse environmental conditions. We are increasingly encountering thermal insulation solutions for elements that have been neglected in the past. One of these constructions is the substructure, which means not only the foundations, but underground floors and plinth. These constructions must be insulated with a material which not only has suitable thermal-insulating properties, but also has to withstand the effects of moisture in the long term. Nowadays, expanded polystyrene with a closed outer structure has become one of the most commonly used thermal insulators for these purposes. However, it is clear that, when built-in, the outer structure of the envelope is often damaged. This is often neglected phenomenon, which has a negative effect in the amount of diffusion flow and moisture propagation in the material. This paper describes a laboratory experiment, in which the outer structure of the EPS samples was broken in various ways. The samples were then fully immersed in water, changes in mass and volume absorbency over time were recorded and results were reciprocally compared.

This contribution deals with the quantity of fillers in bitumen waterproofing sheets used for waterproofing of concrete bridge decks. The contribution shows on samples of bitumen waterproofing sheets from various manufacturers what the usual quantity of filler is in these products. The contribution also answers to the hypothesis whether increased or decreased filler quantity affects one of the basic thermal-technical quality of bitumen waterproofing sheets, namely flow resistance at higher temperature. The contribution also contains basic price calculation for these bitumen waterproofing sheets based on the input materials and shows dependence between temperature resistance and manufacturing costs of input materials.