This article deals with the assessment of applicability of OSB boards as the main airtightening layer. Different material thicknesses and various kinds of surface modifications of boards were tested. Measurements were performed with blower-door test in an airtight chamber, which is located in the experimental wooden structure EXDR 1. The article describes a procedure of the experiment and its results.

The paper presents the basic characteristics of fiber reinforced concrete (FRC) that affect its durability and allow to increase service design life of load bearing construction from FRC. This effect is in more detail demonstrated on the test results of the test samples, i.e. strength characteristics, obtained homogeneity and carbonation. The paper focuses on the SFRC, i.e. FRC when using metallic fibres.

Grey form of an expanded polystyrene (EPS) insulation have been used in the Czech Republic since 2005. It is necessary to respect application differences in between grey and white form of EPS. It´s not EPS such as EPS, in this case.

The surface temperature as one of the most watched parametres of the opening panes and light enveopes not only in the Czech Republic is being assessed in a view of risk of water vapour condensation, or more precisely in a view of their health and a hygyenic flaws and ecologically sound environment where inbuilt. The mening is determination if the structure is suitable for the marginal conditions or whether is necessary to choose another structure.

In the article, I would like to draw attention to the issue with an outside window lintel on existing double glazed windows. The lintel is mounted below the other lintel and can therefore when replacing windows in modern window to form a problem. The article presents possible solutions window lintel. The most appropriate way is a solution that includes the total renovation of the building envelope with the replacement of windows.

Paper introduces the energy study for old building retrofit for future Centre of Low Energy Buildings in Pisek. Design of the energy efficient buildings with nonuniform user structure (combined residential, administration and technology use) requires the detailed dynamic simulations of buildings and energy system to develop the optimum concept meeting the comfort demand on one side and energy efficiency on the other side with minimized investment costs. Energy study of building retrofit for the Centre has shown how important could be knowledge on future building use in the design stage and has clarified the questionable issues for further design process (high fraction of fan power on electricity demand, suitable extent of PVT collectors use, optimum storage capacity for heat and cold and its cost benefit).

The article presents a technological procedure and possibilities for surface treatment of different materials by using compact parts of CO₂dry ice. A purifying medium is accelerated in the nozzle of the SDI Select 60 device by compressed air stream to a supersonic speed, and so it reaches high kinetic energy. The impact of CO₂ at the temperature −78.8 °C rapidly cools down the surface; dirtiness becomes brittle and loses its base adhesion, causing temperature shock. Simultaneously with this temperature effect, dry ice intensively sublimates, increases its volume and removes, at high inner tension, the impaired surface of dirtiness without any formation of abrasion waste. The device is applicable to the removal of contamination from elements which cannot be saturated with water or when it is necessary to modify elements with no need to dismantle them. The report introduces the technology when removing contamination on the surface of wooden construction elements, artefacts and stone statues, as well as when forming a relief on the native wooden surface and at a surface treatment before the application of paint, or fungicidal and insecticidal agents.

Drying masonry building structures using high-frequency electromagnetic (EMW) radiation, so-called. Microwave technology in construction practice becoming more exercise. It is an innovative method which can be used to remove excess moisture significantly speed. This article focuses on the description of physical phenomena that occur during drying and comparison standard, the most commonly used, processes for drying buildings.

In the last few years the engineered building product cross laminated timber (CLT) has become very common in timber engineering applications. CLT is a cost-competitive wood-based solution that complements the existing light and heavy-frame options, and is a suitable substitute for some applications which currently use concrete, masonry and steel. This contribution deals with the analysis and design of CLT, used as floor elements. Different calculation procedures for plates loaded out-of-plane are discussed. Comprehensive 3D finite element models (ANSYS 14.0), which can be used to analyze the mechanical behaviour of the board of CLT, were developed.

The landscape character protection is nowadays widely used term within the nature and countryside protection processes that influences the architectonic and urban forms of many construction intentions. It represents some limitations for large construction intentions and also for the single building constructions. It is applied on the landscape protected territories and also on the already settled areas or directly in towns. This article presents different cases when the knowledge of this landscape and nature protection instrument is very important for the architect and shows us the examples when the knowledge can anticipate some unpleasant surprises during the approval process of different construction intentions.

The paper presents the design and construction of the wooden roof structure covering the Penny market building, which is located in the Czech Republic and was built in the summer of 2013. The building of the roof structure was based on the 26 m long elements consisting of 2 or 3 trusses assembled with punched metal plate fasteners and bracing members. The design philosophy, details and descriptions of choosen methods used in the roof design are part of the paper.

This paper is concerned with selected defects and failures of timber buildings. The paper is based on the findings of theoretical, implementation and realization work of loadbearing systems used for timber houses.
Due to the fact that the load-bearing capacity and deflections of timber structures are considerably affected by the load-bearing capacity of joints, it is desirable to verify the influence of structural design of connectors on the overall behaviour of structural systems.Findings from behaviour of structures after their rehabilitation are crucial for further research into real behaviour of timber structures. The paper contains authors, conclusions from designing, realization and exploration of selected building structures.

The article deals with the properties of concrete with two natural zeolites as a the supplementary cementitious material. The determined parameters bring the findings of basic mechanical propeties and frost resistance of aerated concretes with zeolites. The results of properties of concrete with two different kind of zeolite are compared to reference concrete without zeolite. Concrete with zeolite Z2 showed worse properties due to finer particles.

Stairs are part of construction. It is important to solve geometrical tolerances of stairs as of other parts of constructions. The most important tolerances of stairs which should be measured are steps (their high and width), because their dimensions could affect safety of stairs.

Acoustic design brings a new perspective to acoustics. Acoustic design tries to solve our uncomfortable noise conditions at any stage of the building. The easiest way is to solve at design and implementation stage. Situation at the stage of final inspection (stage to prepare to use) is more difficult. The most difficult path to the real solution is in using phase. Acoustic design focuses on the layout of dwellings to each other, the position of rooms within a house or apartments. Acoustic design solves issues of additional installations of suspended ceilings, primary plus secondary (added) walls and other acoustic absorbing elements that reduce reverberation time. Acoustic design also deals with a newly and additionally installed technologies such as modern air-condition units, new lifts, special heat pumps etc. The main point is to get the right balance between acoustic comfort of living and system of building construction using new technologies.

This contribution deal with the testing of thermal resistance and derived thermal transmittance of timbered wall from spruce wood beams 300 mm thick according to the standard EN ISO 8990 by Hot Guarded Box method. Thermal conductivity tests of individual layers made from the tested wall were carried out according to the standard ISO 8302 by Guarded Hot Plate method after the test according to the standard EN ISO 8990. These thermal conductivity tests were carried out for the average thermal resistance determination of the wall from the equivalent thermal conductivity and also for the comparison with the value founded by Hot Guarded Box method. The part of the tests was also the determination of mass moisture of individual layers and then the equivalent mass moisture of the wall. The contribution contains the maximal requirement values of thermal transmittance of the exterior walls according to the national standard ČSN 73 0540-2. The contribution contains also informative table of thermal conductivities of the plates of different wood profiles founded by tests or from literature.

The paper summarizes important information related to the field of design of wooden buildings from the point of view of the sound reduction index. The text is focused on wooden structures (both massive wood systems and wood frame systems) as well as on particularities of an acoustic behaviour of wooden floor structures with fillings. General principles are described which may serve as useful hints for architects and project engineers when designing structures with wooden elements. Emphasis is primarily put on the specific acoustic behaviour of wooden buildings in comparison with masonry and concrete structures.

The main purpose of this paper is to show how the different structural details affect the airborne sound insulation of lightweight building elements. The sound reduction index of such structures depends on several phenomena like the cavity attenuation, the mass-air-mass resonance, standing waves resonance, sound transmission via sound bridges etc. This paper describes their effect on sound insulation and gives the initiative information for optimized acoustic design.

The heat transfer between apartments operated on various internal temperatures objectively exists and under certain circumstances this may represent an important proportion of the total heat loss of the apartment. Is it possible to quantify the financial impact of the heat parasitism?

The article describes sensor system for increased moisture detection in construction materials, especially in the wood. The assumption is that a sensor network is built-in into the construction elements of the building and it is connected to a central unit. The goal is to develop a sensor suitable for permanent installation in the construction during realization of the building. The sensor network enables early warning and fast detection of increasing moisture in the building and alert building owner or operator. The sensors will be placed at critical building’s locations with high risk of plumbing accidents. Using the installed sensor system it is possible approximately locate the place of failure, shorten detection time and substantially reduce damage and reconstruction costs.