What is WTA?
Dates & New Publications
Current dates
New Publications
-
6-9 Edition: 01.2026/D
Air-tightness in existing buildings, Part 1: Planning principles (revision) -
6-10 Edition: 01.2026/D
Air-tightness in existing buildings, Part 2: Detailed planning and implementation (revision) -
6-11 Edition: 01.2026/D
Air Tightness in Existing Buildings, Part 3: Measuring Air Tightness (revision) -
E-6-23 Edition: 04.2026/D
Radon in existing Buildings
WTA Germany
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WTA Belarus Беларусь