Does the airtightness depend on construction type?

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Measurements usually show that light (e.g., timber-frame or steel) constructions are leakier than massive construction, but this is not bound to be. In fact, PassivHaus houses are often light constructions and are very airtight.

The general statement that can be drawn is that light constructions are more sensitive as the airtight layer can be more affected by poor design and workmanship than in massive constructions.

Anwered by: Rémi Carrié and Gaëlle Guyot (CETE de Lyon)
Date: 2008/12/12