<div dir="ltr"><div><div><div>I would tend to agree with Paula and Chris, We've not done whole wall assemblies but sections of wall similarly and it has been problematic. We have done multi stories of bale with 6-12" of structural cob exterior, tied to the bales with a light wattle in the center of the cob.<br>
<br></div>If you are considering a 26" overall assembly I would be tempted to build one monolithic for ease of construction - cost savings and balanced drying; concentrating on a mix that maximizes insulation while barely meeting your structural requirements (including factor of safety). Insulative agregates and various types of fiber that are less mold generating. I could imagine cobbing with three or more mixes that are specified to be denser from the exterior to the interior and still integrating the whole assembly as you went.<br>
<br></div>Seems to obvious for no one to have tried that before...Hope they or someone they know are on this list.<br><br></div><div>Either way I'm inspired to do some testing<br></div><div><br></div>Tim<br></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Mon, Apr 29, 2013 at 10:32 AM, Paula Baker-Laporte <span dir="ltr"><<a href="mailto:paula@econest.com" target="_blank">paula@econest.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
My concern would also be that the straw clay would only be able to dry from one side and that the cob would add to the moisture content for a long time...too long to dry the wall out safely.<div>Building the straw clay wall first and then adding something like adobe to the interior could work.</div>
<div> <div>Paula<div><div class="h5"><br><br><div class="gmail_quote">On Mon, Apr 29, 2013 at 10:07 AM, Chris Magwood <span dir="ltr"><<a href="mailto:chris@endeavourcentre.org" target="_blank">chris@endeavourcentre.org</a>></span> wrote:<br>
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My concern would be drying for the straw/clay. We have a hard time
getting straw/clay to dry in our warm but humid summer. We count on
a week per inch of wall thickness, and that's with both sides of the
wall exposed. Sometimes we have to help things along with a fan on
the interior because the drying is slower in the still air. With one
side of the straw/clay up against cob (which may still be drying
itself?) I would worry about the straw/clay not drying out at all
before it starts to get mushy in there.<br>
<br>
What about double wythe cob with a dry insulation in between? <br>
<br>
Chris<br>
<br>
On 13-04-29 11:38 AM, Bruce King wrote:
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<div>A client in North Carolina (mixed climate, no earthquakes)
wants to build a large assembly structure on load-bearing cob,
which doesn't insulate too well. He doesn't want to use bales
with thick earthen plaster, either.</div>
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So our idea was to build a wall that would look like this, from
inside to out:
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<div>14" -- 18" of load-bearing cob</div>
<div>8" -- 12" of light straw-clay</div>
<div>lime plaster</div>
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<div>Has anyone already done this, or heard of it? Any reports of
comments?<br>
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<pre>_______________________________________________
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<br>
<pre cols="72">--
Chris Magwood
Director, Endeavour Centre
<a href="http://www.endeavourcentre.org" target="_blank">www.endeavourcentre.org</a></pre>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br></div></div>Paula Baker-Laporte FAIA,BBP<br>Econest Architecture Inc.<br><a href="http://www.EcoNest.com" target="_blank">www.EcoNest.com</a><br><a href="mailto:paula@econest.com" target="_blank">paula@econest.com</a><br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Tim Owen-Kennedy, Owner<br>Vital Systems, natural building & design<br>P O Box 751, Ukiah, CA 95482<br><a href="http://www.vitalsystems.net">www.vitalsystems.net</a><br>
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