Building Airtightness in Czech Technical Standards and Related Documents - Last Updates

The basic statistics of airtightness test results collected since 2002 in the Czech Republic are presented. The test results are compared with the limit values according to national standard CSN 730540-2. An overview of airtightness related requirements stipulated in this standard is introduced in short with an emphasis on the overall airtightness of building envelope. New preliminary standards focused on the assessment and classification of low-energy and passive houses are presented. The aim of these documents is explained. The airtightness related requirements of these preliminary standards are described in more details, namely the procedures for measurement of residential buildings and evaluation of test results. The contribution aims to support the discussion and an exchange of experience concerning such methods.