Airtightness and Heat Energy Loss of Mid-Size Terraced Houses Built of Different Construction Materials

The European Union has adopted legislation aimed to increase the use of renewable energy and improve effectiveness conventional-form use. Additional structure insulation helps decrease heat loss. Airtightness building envelope (building airtightness) is an additional factor that determines comfortable energy-saving living environment. conformity loss with object’s design class one mandatory indicators used in obligatory performance certification procedure. Optionally, objects be certified are entire buildings or separate units (flats). There issue concern whether a flat assessed as housing unit would meet requirements depending on location building. study determine change end terraced houses (townhouses) result various factors, leading uneven airtightness envelope. non-destructive assessment was implemented through combined methods, namely Blower Door Test (around 200 measurements) Infrared Thermography. hollow clay masonry showed ca. 7–11% less than sand–lime block structure. were up 20% airtight compared inside units.