The paper presented method of laboratory measurements for specifies air permeability of building board elements of wood- based. The aim of laboratory measurements was to designate value of air permeability of building board elements of wood- based. The results from measurement are in form protocols which indicate air permeability for differential pressure 50 Pa. The value air permeability decides about application and quality building board elements for airtight layer.

Forestry and forest management plays many roles in the landscape and in the socio-economic area. Forests represent a landscape stabilizer, the best preserved part of the landscape of predominantly natural character with significant application of natural, spontaneous process. It also serves as a source of material benefits to human society. The wood-producing function of forests was questuioned in this country in recent years. Above all, leaders of various environmentalist movement are demanding ever greater proportion of forests without economic activity. However, forestry is afflicted by such influences by decades and the aim of this paper is to demonstrate possible implications of these trends for forestry and subsequent economic sectors.

Setting out and control of a vertical direction belong among often solved tasks in civil engineering. In order to setting out a plumb line the optical plumbing instruments are used. The most commonly used instrument for this activity is Zeiss PZL (Zeiss Zenitholt PZL 100). This contribution describes the procedure and results of testing according to STN ISO 17123-7: 2010 Optics and optical instruments – Field procedures for testing geodetic and surveying instruments. Part 7: Optical plumbing instruments.

This article describes a modification of wood-polymer composite using waste and secondary raw materials. It also shows the anticipated tests that will be carried out on samples prepared by innovative technology to ensure accurate interpretation of results.

The linear thermal expansion is thermal technical parameters that are important for the specific application of products site. The dilatometer was used on each given speciments of sizes 2 × 12 × thick, gradually increasing the temperature to 1000 °C and change in length was measured. From this was calculated coefficient α.

The paper describes the circumstances that often lead to disputes about result quality of industrial floors. In addition to quantitative parameters, such as flexural rigidity of plate, coating adhesion to the surface layer and local flatness, attention has always focused on the appearance of the visible surface. The paper proposed assessment methodology that would allow at least partly quality assessment of the coating as a whole objectify and create all interested parties basis for fair negotiations.

The paper focuses on analyzing the basic parameters of fly ash, a by-product of the cement chipboards. Furthermore, the comparison with selected types of energy by-products. Specifically, the testing of these alternative materials in terms of selected parameters, which is essential for subsequent use in cementitious composites with organic reinforcement.

Floors are made by construction layers of different materials with unequal functions and characteristics. This formation creates functional unit. According to the material of bearing layer dry and traditional floor systems are distinguished. In dry floors the bearing layer is made by board prefabricated element, e. g. gypsum fiber board, cement bonded particle board or oriented strand board.
Floors must be designed in accordance with legislative and technical requirements. Thermal and technical requirements are of basic significance. Guarantee of required contact temperature decline value presents a significant parameter for ensuring the thermal comfort.
This article compares an influence of three materials of dry floors bearing layer and two materials of wearing layer on the value of contact temperature decline.

The paper presents examples of defects that are associated with application of finishes impervious for diffusion to damp concrete, or concrete, which water in liquid or gaseous phase can migrate through. Described are the possible mechanisms of failure.

In two volumes we present a modern large format tiles. In the first part it will be the possibility of their use, including methods of laying, in the second part of the expansion issue, adhesives and grouts. Traditional ceramic tiles have changed significantly. Rapid technological development has enabled to provide users a completely new format tiles. The dimensional changes can be observed in both directions. Mosaics have been reduced to the size less than 10 mm of the edge and paving and tilesgrow to impressive sizes.

In two volumes we present a modern large format tiles. In the first part it will be the possibility of their use, including methods of laying, in the second part of the expansion issue, adhesives and grouts. Traditional ceramic tiles have changed significantly. Rapid technological development has enabled to provide users a completely new format tiles. The dimensional changes can be observed in both directions. Mosaics have been reduced to the size less than 10 mm of the edge and paving and tilesgrow to impressive sizes.

This paper deals with predictions of reverberation time of sports buildings in the phase of project preparation. On the set of nine buildings, the comparison of calculated results with in-situ measured data is done. Different prediction methods and computer simulations have been included in this work.

The comparison of different approaches to the evaluation of airborne sound insulation between rooms is given in this paper. Based on the described advantages and disadvantages, the most appropriate approach is chosen. Emphasis is laid on the uniformity of assessment for different types of building elements and users of buildings, so that the values of objective quantities for airborne sound insulation should correlate with subjective evaluation.

Cracks in industrial concrete floors with top layer of mineral granules are quite common. Their evaluation depends largely on the subjective opinion of the assessors. It is not the exception that the cracks appear after a longer time in the order of weeks to months after the construction. At the time up to three years after construction there is a tendency of their expansion. Cracks have a major impact on the life of industrial concrete floors.

Cross laminated timber is likely to happen in the near future, the most important product in solid wood construction in residential and high-rise construction. Depending on the size of the used components and their mutual orientation can produce a wide range of products.

Floors are one of the most long complained structures. Described examples of industrial floors show still the same recurring faults and their causes. The text describes three examples of floors that the author recently assessed either at the initiative of the user of the object, or on the initiative of building contractor.

Development of construction industry requires the development of improved properties of various materials. Innovation material properties provide cost advantages over conventional solutions, and can also bring greater flexibility in the construction. The construction applies a wide range of traditional materials, including plywood boards.

Fire engineering is a way to define the requirements of fire safety at risk, complex and unusual structures. It consists in a specific risk assessment of fire safety conditions in a different ways from those of the procedure prescribed in Czech technical standards under § 99 of Act No. 133/1985 Coll. for fire protection. Notes on the standards will be presented in three parts. Part One: Non-industrial buildings.

The paper describes existing databases of environmental data of building products with focus on Czech tool Envimat.cz. It is an online tool, which provides environmental indicators of building materials with main purpose of providing a unified, transparent and reliable system that allows user to compare different products and structures; motivate the producers to fill in data sets of their products and improve their technologies; convince architects and designers to care about different sustainability profiles of materials; give advantage to products that have lower environmental impacts being at the same technical level than the competitor. The implementation of Envimat is divided into the three main phases: start-up phase (data from the generic database); transitional phase (combination of generic and localized data); regular operation with fully localized data.