Turbulent but often incompetent discussions about more stringent building-energy requirements are accompanied by calculations proving - often biased - what is needed. The article deals with the problem of reliability of building-energy calculations, especially when combined with financial evaluation. The stochastic calculation of energy performance of a large sample of buildings is used. Costs increase of low-energy solutions is discussed.

The current trend in the use of secondary raw materials, constantly growing demands to reduce the overall energy performance of buildings and the elimination of thermal bridges both in the design phase and in the implementation phase, helps solve a new element of the threshold coupling, combining the above mentioned requirements for construction. The threshold coupling is inserted in the form of plates under the frame fills of building hole which borders between the exterior and interior of the building. The variability is in the possibility of height and longitudinal adjustment to the exact size and greater range of boards with several kinds of geometrical modifications allowing waterproof closing of waterproofing made of the commonly used materials.

The article deals with static design of saddle roof frame with two middle purlins. This kind of bearing stucture is widely used for roofing of family houses. There are shown diferent computational models. These models are compared and evaluated.

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.

The paper analyses available data sources on the use of renewable energy in Czech households from which it is possible to derive the current distribution of these sources in the Czech residential sector. Available data provide information about biomass, solar and heat pump installations. The data indicate that the most frequently used renewable energy source among Czech households is biomass, which is the main source of heating in approximately 8 % of inhabited dwellings. Heat pumps are installed in 0.5 % and solar energy is used in at least 1 % of all the Czech inhabited dwellings. It also indicates that these renewable energy sources are far more used in detached family houses rather than in apartment houses. Overall, most of the renewable energy sources used in Czech households are in the Central Bohemian Region, the least in Karlovy Vary Region and the capital city of Prague. Although the datasets do not provide enough evidence to derive any reliable development trends, they provide useful information on the minimal distribution of these resources in the past 10 years and also the effect of selected policy instruments to support the use of these resources on Czech households in comparison with the situation before they came into force.

Change of the standard ČSN 73 0810/Z1 (valid from  1^st June 2012) introduces a new term - so-called „equivalent DP1“.This represented an exception in the classification of non-combustible components for some products. This exception was cancelled by the Change ČSN 73 0810/Z3 valid from 1^st July 2013.

This year there has been a change in the assessment of the conformity of construction products. From July 1^st 2013 the REGULATION OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL No 305/2011 (issued on March 9^th 2011) laying down harmonized conditions for the marketing of construction products and repealing Council Directive 89/106/EEC will come into full force. What will be the benefit for manufacturers?

Of course, the social order is low-energy buildings to be also effective. However, this objective cannot be only declarative nature, but must be supported by correct results showing that the investment plan will generate real economic effect in the form of profit or positive cash flow for an investor or user for the period considered.

Building Act (Act. No. 183/2006 Coll.) in its regulations frequently uses the term of built up area, particularly in the context of built up area of building (hereinafter referred to as “built up area”). Correct determination of built up area is highly significant. Unfortunately, the Building Act did not contain a definition and a method of determining the built up area.
On January 1, 2013 came into effect an extensive amendment of the Building Act (Act No. 350/2012 Coll.). The aim of a legislature was to bring clarity and to provide clear way to determine the built up area. This is defined in § 2 clause (7) of this Act. This definition is not considered unambiguous, though.
The aim of this paper is to analyze the regulations of the Building Act in detail and to find a probable way of correct determination of the built up area. All facts presented in this paper should be taken as the opinions of the authors and should not be considered as a binding interpretation of the law, which is due only to the independent court.

The University Centre of Energy Efficient Buildings is a newly established interdisciplinary research institute of Czech Technical University focused to energy efficient buildings having the healthy indoor environment that, at the same time, are environmentally friendly. The main objective for the Centre establishment is the development of technologies for the energy demand reduction and the efficient improvement of natural sources concerning new constructions and reconstructions of existing buildings. The objective is to be achieved by the holistic approach, the expert knowledge concentration from the field of architecture, construction, mechanical engineering, information technologies, and hygiene of indoor environment and the top instrument equipment of the Centre.

Experimental measurement of temperature changes in inverse cold flat roof structure with main focus on influence of the humidity on inner surface temperature.

The importance of material testing is increasing with new requirements for structures. The priority is to improve quality of measurement process of materials, building parts and structures and utilize modern computing capabilities and automatization.

The author determines this article to parties interested in business in the field of the technical infrastructure building management. He provides the fundamental information as concerns the provision of technical services at the real estate management in the area of the building technical facility in all buildings of the client of the services provider in the formof the facility management. The author deals above all with buildings serving exclusively for the administrative purposes within the range from large buildings in the possession to small workplaces in leased buildings.

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.

In the second half of the last century the village changes in terms of demographics. First, the outhouses lose their importance, later, the living houses got empty. At best, the homesteads are used for weekend recreation. As a result of these changes, and due to improper construction impacts the houses dilapidate. There is material destruction and creation of static structural failure of the house.

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 article deals with the questions of concrete homogeneity, above all with possibilities how to verify this characteristic. We manufactured for this experiment two concrete blocks with dimensions 300×300×900 mm from concrete C 20/25 and then we determined their homogeneity using non-destructive and destructive testing methods. It is only a small part of experimental research, but it is possible to generalize research results and conclusions. We verified the concrete homogeneity in real structure using the ultrasonic impulse method – on columns of monolithic frame of car shelter.

One of the reasons why building with almost zero energy consumption does not meet the expectation is that it may be too complicated. Another factor is that the project may be too optimistic, and other unforeseen factors, such as office equipment, which actually dominates the energy balance of the building.

Cornice is a traditional architectural element that is unfortunately disappeared from the current buildings. It is often replaced by methods that do not fulfill their architectural or construction function adequately.

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.