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Some of us EuroBaleHeads are indeed aware of the test you mention
;-) . We talked about it with 'Murrican' David Eisenberg during the
last European gathering in Belgium as he was involved in that
particular testing. I understood that there was a considerable space
between the bales and the gypsum board and that he believes that
this air-space increases tremendously the convection that is common
in fibrous insulation materials. If I understood him correctly he
does not consider it a problem to put a bale tightly agains a panel
but strongly advices against an airspace between the bales and a
panel. Herbert, has any testing been done on your finished panels or is 'your' R value based on a theoretical accumulation of the different matérials you use? Bye, André France =========================== This is the Note Below I don't know if EuroBaleHeads are aware of the first set of thermal resistance tests that were performed on SB wall panels at the Oak Ridge National Laboratory (ORNL) back in the previous millennium which resulted in alarmingly low thermal resistance values for the SB walls tested. I forget what the actual test results were (something like R-10 ft^2*hr*degF/Btu (or RSI -1.76 m^2*degC/W in metric units) or less if I recall correctly ? (Hoping someone will correct me with the actual number) ... but I do recall that it was lower than the thermal resistance of a conventional wood-framed/fibre batt-insulated wall using skinny 2x4 (38 x 89 mm) studs. I also remember that the reason for the disgustingly low thermal resistance value of those first SB test wall panels was attributed to their being clad with gypsum board sheathing rather than wet-applied plaster and that since the board sheathing could not conform to the irregular surface of the SB, allowed air movement to occur at the cladding/SB interface so that thermal resistance-lowering convection currents occurred within the SB wall. I suspect that the identical process would occur when OSB is substituted for gypsum board sheathing.Ce message entrant est certifie sans virus connu. Analyse effectuee par AVG - www.avg.fr Version: 9.0.872 / Base de donnees virale: 271.1.1/3304 - Date: 12/08/10 08:34:00 |