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Hello, Thanks Desert David for correcting what I understood of our conversation. I see no point in trying to reduce the convection in the correctly built and plasterd SB walls (where all the holes are correctly stuffed). Ok, there is some convection in fibrous insulation material; probably because they contain larger air spaces than 'normal' insulation materials . But we still have VERY well preforming walls so let's put our attention on other details that make a well preforming building. Also, including 'solutions' for imaginary problems often create new real problems. As for the performance of SB combined with panels; rather drawing a final conclusion from 1 test (even if it were done by the best experts) or a gut feeling I feel that it is a field where I would first like to see a lot more hard data. Adapting Bruce's book 'Design of SB Buildings' to french made me realize that thermal testing is a very complex thing. That mistakes (in the protocol, in comparing and in drawing conlusions) are easily made and the numbers that come out give us, at best, a very limited vision of thermal reality. Still, they are clues to a better understanding. And then there is the real world... Herbert, are there any pasif house buildings made with OSB and SB that live up to those expectations? Thanks Carol for Jan Lacompte's paper (http://www.viking-house.ie/downloads/Lecompte%20paper_partial%20fill%20cavity%20walling.pdf) I wish you all a nice day, André - drowning in Cognac - de Bouter France Le 08/12/2010 23:59, Jan Hollan a écrit : I've wondered what can be done about this. Convection needs height to really get going so I wonder if some less permeable layer laid horizontally between the layers of bales might reduce it some. |