The air sealing was achieved along the outside, the entire walls in concrete masonry were treated with Blowerproof Liquid. Originally a cementation was provided, but due to the considerable qualitative advantage, an airtight "Blowerproof Liquid" coating was chosen. Window connections were also treated with Blowerproof Liquid Brush on the outside. This method of air sealing formed the basis for other Schools of Tomorrow projects.
Result Blowerproof test: n50 < 0.48 m³/h ( Passive building ).
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