The main subjects of the thesis are new materials and assessment of ventilation efficiency floors. As we are working with old buildings most of all, in most cases waterproofing is not working and simply it is missing. The rising humidity can, without any problems, penetrate higher to the brickwork or flooring above. Therefore we need a suitable solution. Software CFD is capable of flow visualisation which is then used as the base for the ventilation efficiency assessment.

The article discusses how to test the functionality of air insulations designed for the floor ventilation in historic buildings and follows on from the previously published articles. A flow analysis is being performed on an object of the City of Zirovnice which has been registered in the list of cultural monuments and was built as a brewery in the years 1589-1592 on the site of an older medieval building. The foundations and external brickwork consist mostly of stone. This article brings new air flow readings. The aim of the article is to analyse in detail the air flow in a specific floor void with the aid of modern CFD programs and experimental measurements using the ALMEMO device.