<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Thank you, Jorge, for greater details on the French research. It appears to me that the construction describes a wall with earthen plaster/render on the inside, and no plaster/render on the outside. Is this correct? If so, the lack of an exterior plaster/render layer would have a significant effect on the thermal characteristics, I would think. As well as fire resistance, structural rigidity, moisture buffering, and perhaps a bit of insect and rodent deterrence. I know that some people build this way, but it seems imprudent to me. Have I misunderstood the nature of the wall that Jean-Pierre Oliva and Samuel Courgey are describing/testing? </div><div><br></div><div>Thank you,</div><div>Derelict</div><div>Derek Roff</div><div><a href="mailto:derek@unm.edu">derek@unm.edu</a></div><br><div><div>On Dec 6, 2011, at 5:52 AM, Van Krieken wrote:</div><div><div>John,<br><br></div><div><div>As I wrote before, the best source of information (I have) about this issue it is the book writen by Jean-Pierre Oliva and Samuel Courgey ( L'Isolation Thermique Ecologique). </div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><br></span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Jean-Pierre Oliva is perhaps the best known french bio climatic architect, and since many years a great enthusiast of straw bale building. His books (also La Architecture Bioclimatique) can be found at Amazon.</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><br></span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Unfortunately, this book is only in FRENCH. I am sorry if my translation was not well done, so I include here the original text in french.</span></div><div><br></div><div>Citing their book, page 175, concerning a wall with wood structure and straw bales with medium density (80 to 110 Kg/m3, strawbale section 34x46cm. Vented façade (or rainscreen claddind) in exterior, and interior with clay render.</div><div><br></div><div>Note.: <span style="font-family: 'Times New Roman,Bold'; font-size: 16px; ">I attach to this discussion a paper wrote by </span><span style="font-family: arial, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); ">Jim Carfrae</span><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); ">, attached to this forum last January, 22, where you may have more information about the benefits on using of a rainscreen clading in a straw bale building, specially on humid climates.</span></div><div><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); "><br></span></div><div><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); ">The rainscreen cladding is included in the calculation of JeanPierre Oliva for this next example:</span></div><div><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); "><br></span></div><div><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); ">Wall:</span></div><div><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); "><br></span></div><div><font face="arial, sans-serif">1. Bardage bois (2cm)</font></div><div><font face="arial, sans-serif">2. lattes support et contre-latte (6cm minimum)</font></div><div><font face="arial, sans-serif">3. Panneaux pare-plui contreventans (16mm)</font></div><div><font face="arial, sans-serif">4. Poteaux bois massif (4x20 tous les 60cm)</font></div><div><font face="arial, sans-serif">5. Liteau de maintien des bottes (toutes les 2 bottes)</font></div><div><font face="arial, sans-serif">6. Botte de paille posé sur champ (36cm)</font></div><div><font face="arial, sans-serif">7. enduit terre (30mm)</font></div><div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif">Caracteristiques Thermiques et environnementales:</font></div><div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif">Coeficient de déperdition thermique U </font>(W/m2K) / R (m2K/W) .................................. 0,13 / 7,76</div><div>Pertes dues aux points thermiques intégrés.................................................................... 4%</div><div>Capacité thermique intérieure quotidienne<span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">kWh/m2K).....................</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">............................. 15 (forte</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">)</span></div><div><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); ">Capacité thermique intérieure séquentielle </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">.....................</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">...............................................25 (moyenne)</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Déphasage (heure) / Atténuation du flux de chaleur (%)..............................................</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">16h / 13%</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Epaisseur supplementaire pour atteindre le niveau "passif"....................................... 0</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Bilan "CO2" du m2 de paroi............................................................................................. -83 kg CO2 eq</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Bilan "energie grise" du m2 de paroi.............................................................................. 62 kWh</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><br></span></div><div><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); "><br></span></div><div><span style="font-size: 13px; font-family: arial, sans-serif; background-color: rgb(255, 255, 255); ">Translation (?):</span></div><div><br></div><div>1. Thermal loss U (W/m2K) / R (m2K/W) .................................. 0,13 / 7,76</div><div>2. Losses due to thermal bridges............................................... 4%</div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">3. Daily</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "> </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">indoor</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "> </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">heat capacity (kWh/m2K)................................ 15 (strong)</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">4. Sequential indoor heat capacity (</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">kWh/m2K)</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">.......................25 (medium)</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">5. Phase shift (hour) / </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">mitigation</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "> </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">of the heat flux (%)............... 16h / 13%</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><br></span></div><div><font color="#333333" face="arial, sans-serif"><br></font></div><div><font color="#333333" face="arial, sans-serif"><br></font></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">All the best</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><br></span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Jorge VK</span></div></div></div><div><br><br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">John Swearingen</b> <span dir="ltr"><<a href="mailto:jswearingen@skillful-means.com" target="_blank">jswearingen@skillful-means.com</a>></span><br>Date: Tue, Nov 29, 2011 at 1:35 AM<br>Subject: Re: [GSBN] Decrement factor of SB walls<br>To: Global Straw Building Network <<a href="mailto:GSBN@sustainablesources.com" target="_blank">GSBN@sustainablesources.com</a>><br><br><br>This is very interesting, and fortunately in English. Unfortunately, I don't really know what it means. Can you explain more?<div><br></div><div><ul><li>U-value I know.</li><li>Thermal bridges to nowhere, I know, but what is a "vented facade" (above).</li><li>What are daily indoor heat capacities and sequential head capacities, and what does "strong" and "medium" mean?</li><li>Phase shift mitigation?</li></ul><div>Thanks!</div></div><div><div><div></div><div><br><div class="gmail_quote">On Mon, Nov 28, 2011 at 3:40 PM, Van Krieken <span dir="ltr"><<a href="mailto:vankrieken@gmail.com" target="_blank">vankrieken@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; position: static; z-index: auto; ">Hi<div><br></div><div>The best source of information about this issue (and many others concerning insulation, thermal mass, etc) it is the book writen by Jean-Pierre Oliva and Samuel Courgey ( L'Isolation Thermique Ecologique).</div><div><br></div><div>Citing their book, page 175, concerning a wall with wood structure and straw bales with medium density (80 to 110 Kg/m3, strawbale section 34x46cm. Vented façade in exterior, and interior with clay render.</div><div><br></div><div><br></div><div>Thermal loss U (W/m2K) / R (m2K/W) .................................. 0,13 / 7,76</div><div>Losses due to thermal bridges............................................... 4%</div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Daily</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "> </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">indoor</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "> </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">heat capacity (kWh/m2K)................................ 15 (strong)</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><span>Sequential indoor</span> <span>heat capacity (</span></span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">kWh/m2K)</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">.......................25 (medium)</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Phase shift (hour) / </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">mitigation</span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "> </span><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">of the heat flux (%)............... 16h / 13%</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><br></span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Unfortunately, this book is only in English. Jean-Pierre Oliva, is one of the best known french bio climatic architects, and since many years a great enthusiast of straw bale building. His books (also La Architectire Bioclimatique) can be found at Amazon.</span></div><div><font color="#333333" face="arial, sans-serif"><br></font></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><br></span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">All the best</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); "><br></span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Jorge VK</span></div><div><span style="color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(245, 245, 245); ">Portugal</span></div></blockquote></div></div></div></div></div></div></div><div><br class="Apple-interchange-newline">
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