The use of building information modeling (BIM) in the Czech Republic is currently at the stage of being slowly established in the Czech building environment. From the viewpoint of applicability in the building industry, the issues of BIM in the Czech Republic are very desirable, mainly because of ever-increasing pressure on the sustainability of construction. This approach is gradually used by some, often multinational, construction companies. The article focuses on finding the possible optimization of approach to the planning and operation of buildings in terms of the energy sustainability of buildings.

A development of fiber-cement composites is often focused on cost-effective and environmentally friendly materials (so-called green materials). Production of this material should produce less waste and it also should use less energy and less natural sources. There are numerous approaches to the development of green composites. One of the possible ways is a utilization of fly ashes instead of the cement part of composite. The paper discusses a development of green cementitious composite which incorporated fly ash materials produced in the Moravian-Silesian region as a partial replacement of the cement part of the composite.

Influence of thermal bonds when evaluating the energy performance of buildings can be included in the calculation approximately by means of a surcharge on the effect of thermal bonds or precisely by using specific linear heat transmission coefficient for thermal bonds between structures. The article presents a comparison of the two options in the energy performance of a particular building, the specific amount of heat for heating the building of a brick passive house based on the foam glass.