Home Forums General Discussion Conference Call on Internal Moisture and Ventilation – 2 Dec Reply To: Conference Call on Internal Moisture and Ventilation – 2 Dec

#1501
Gleb Speranski
Participant

Hi all,

I agree with Lois- the only house (apart from a poll house) that does not require a ground vapour barrier is the one that already got it. 🙂

However, Rotorua presents some additional challenges due to a higher vapour content in the porous pumice soil. I can only guess that geothermal activity in the ground may cause some immense vapour transport into houses above. My idea of a custom designed floor system for such areas would have a totally impermeable membrane (preferably rigid) to the bottom of floor joists. Subsequently, the subfloor area would have to be exposed to provide as much ventilation to it as possible.