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The WTA-Leaflets (International Association for Science and Technology of Building Maintenance and Monuments Preservation", (WTA)) provide recommendations on how a defined quality of building airtightness can be achieved when renovating existing buildings. These recommendations are guidelines that support planners, builder and quality inspectors involved in construction in their implementation.
The leaflet series consists of 3 parts:
- Part 1 (WTA-Leaflet 6-9) defines the required level of airtightness for renovated buildings and building elements. Moreover, basic planning rules are formulated.
- Part 2 (WTA-Leaflet 6-10) gives information about planning details, sources of errors, construction options as well as methods to check the quality.
- Part 3 (WTA-Leaflet 6-11) focuses on suitable methods for airtightness testing with leak detection of existing and renovated buildings, including the building preparation and the best times for testing.
The leaflets are expected to be published at the end of 2024 / beginning of 2025.