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Dear All, I am trying to evaluate the buffering effect of porous clay
plaster on internal humidity variations. A search of the list archive has drawn
a blank on this topic, so perhaps someone can shed some light on my queries. In the Type 56 manual, why is the mass of the surface buffer
calculated using twice the buffer thickness (Eq.6.4.3-10)? Is there a reason
for doubling the construction mass for moisture storage calculations? The Buffer Storage Example uses double the penetration depth
to calculate the surface buffer mass, as expected from Eq.6.4.3-10, but then
uses the actual layer depth to calculate the mineral wool mass in the deep
buffer – any explanations for this apparent discrepancy? The deep buffer mass in the example includes the surface
buffer mass - is this correct? Finally, can anyone comment on the validity of the typical
surface exchange coefficient per m2 (Eq.6.4.3-11) when walls have a porous clay
plaster finish? Many thanks in advance for any advice. Regards, Neil Shankland CoSA Solutions Buro Happold LS10 1NE T: 0113 204 2956 F: 0870 787 4144 This transmission is confidential and
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