[Gibbon1]

If it's permeable then water will condense inside it and it will develop mold and deteriorate. That is the fate of all of these passive houses.

[throw0101a]

Not necessarily. Mold grows in certain conditions: food availability, right temperature, water/moisture.

Ideally you would want your insulation outside of vapour barrier:

* https://www.buildingscience.com/documents/insights/bsi-001-t...

* https://www.youtube.com/watch?v=rkfAcWpOYAA&t=22m58s

* https://www.youtube.com/watch?v=hTwq-qUnr9I