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RE: GSBN:40% humidity
In my research into the effects of moisture on SB, I have been reading stuff by Tim Padfield, who while not being a SB expert, is certainly an expert on the passive control of internal humidity.
He does a lot of work for Museums with the same sort of demands for constant low RH.
His doctorate was entitled
'THE ROLE OF
ABSORBENT BUILDING MATERIALS
IN MODERATING CHANGES OF
His web address is <a target="_blank" href="http://www.padfield.org/tim/cfys/">http://www.padfield.org/tim/cfys/</a>
You also mention the need to keep straw under 20% - at a relative humidity of 40%, the straw would have a moisture content below 10% (not taking into account the external RH)
PhD Research Student
Room 119, Reynolds Building
University of Plymouth
From: GSBN [GSBN@...] On Behalf Of André de Bouter [email@example.com]
Sent: 06 November 2007 07:56
To: GSBN; ACHTE Christophe
Subject: GSBN:40% humidity
Christophe Achte (that same army engineer student I mentioned earlier)
told me of a project of the French army were electronical material will
be stalled (for future use) in buildings that should keep the humidity
at a constant 40% to avoid corrosion of the material. He wondered if SB
with earthen plasters could be used instead of airtight 'modern'
materials. The need to keep the straw under 20% makes me hesitate to
give an answer. But someone who participated in the discussion told us
that 70% humidity in wine cellars is quite common.
Do we have any info, from the Ridge Winery for instance, that might shed
light on this subject?
André -hic- de Bouter