IWI/Masonry Interface - time spent at critical limit

[fostertom]

I have taken the liberty to copy this to here, from http://www.wufi-forum.com/viewtopic.php?f=3&t=817, because I also would like answers.

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Hello,

From reading some other replies and various literature, a critical limit of 95% RH is suggested for woodfibre IWI at the boundary between the board and the masonry. Is there a suggested limit for annual hours spent at this RH? I have some modeled examples where around 20% of time is at 95+ and almost 100% of time at 90+.

Also related to this is the question of the critical limit being increased in the absence of oxygen. I have read various work by Viitanen and others but can't find any reference to this, in fact others say that oxygen levels are a minor factor affecting germination and growth of fungi.

If anyone can help with either of these issues, I'd be very grateful.

Thanks,

Simon

[Christian Bludau]

Hello Tom,
please do not copy the messages somewhere else, as we have to answer twice...
You get the answers if you write something to the topics or just watch them.
Christian

Answer here: http://www.wufi-forum.com/viewtopic.php?f=3&t=817

[fostertom]

Sorry Christian