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The Work of Art and The Art of Work Kiko Denzer on Art |
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Cob: plastering adobes, clarificationben graham benfrankg at hotmail.comSat Mar 3 14:37:49 CST 2001
<html><DIV> <P>Thanks for clarifying John. I was refering to "earthen" plasters in my response to the original message. I also believe, like Annike(sp?) that portland stucco did not work with adobe or any earthen structure.</P> <P>Thanks</P> <P>BenGraham<BR><BR></P></DIV> <DIV></DIV> <DIV></DIV>>From: John Fordice <OTHERFISH at HOME.COM> <DIV></DIV>>Reply-To: otherfish at home.com <DIV></DIV>>To: ben graham <BENFRANKG at HOTMAIL.COM> <DIV></DIV>>CC: adobe50 at hotmail.com, coblist at deatech.com <DIV></DIV>>Subject: Re: Cob: plastering adobes <DIV></DIV>>Date: Fri, 02 Mar 2001 17:48:54 -0800 <DIV></DIV>> <DIV></DIV>>Experience has shown the use of portland cement plaster (commonly known <DIV></DIV>>as stucco) to be detrimental to earth walls. <DIV></DIV>>As I understand it, what happens is: The stucco will develop cracks ( <DIV></DIV>>as stucco does ) & this will let water into the wall. Since the stucco <DIV></DIV>>passes water vapor more slowly that the earth wall, the moisture will <DIV></DIV>>tend to collect in the outer portion of the earth wall. When the wall <DIV></DIV>>cools at night or in cold weather, the moisture that has thus been thus <DIV></DIV>>essentially trapped in the wall will then condense on the backside <DIV></DIV>>(earth wall contact side) of the stucco and cause a softening of the <DIV></DIV>>earth wall it that point. This ultimately results in a spalling off of <DIV></DIV>>the outer layer of the earth wall and a loss of bond between the wall at <DIV></DIV>>the stucco covering. The stucco then is free to crack even more, <DIV></DIV>>aggravating the condition & it eventually comes loose and takes a <DIV></DIV>>portion of the outer surface of the wall with it. <DIV></DIV>>So the stucco which was put on the wall to protect it, actually damages <DIV></DIV>>the wall & makes for greater erosion of the wall than if it had been <DIV></DIV>>left un plastered. <DIV></DIV>> <DIV></DIV>>If you wish to plaster cob, use an earth or lime sand plaster. <DIV></DIV>> <DIV></DIV>>ben graham wrote: <DIV></DIV>> > <DIV></DIV>> > Laura, <DIV></DIV>> > <DIV></DIV>> > I think you have the right idea. Plastering adobe is just like <DIV></DIV>> > plastering cob. All the in between brick spaces actually support the <DIV></DIV>> > plaster better, so no lath is necessary. <DIV></DIV>> > <DIV></DIV>> > Best <DIV></DIV>> > <DIV></DIV>> > Ben Graham <DIV></DIV>> > <DIV></DIV>> > >From: "Laura Guldin" <DIV></DIV>> > >Reply-To: "Laura Guldin" <DIV></DIV>> > >To: coblist at deatech.com <DIV></DIV>> > >Subject: Cob: plastering adobes <DIV></DIV>> > >Date: Thu, 01 Mar 2001 22:31:54 <DIV></DIV>> > > <DIV></DIV>> > >Hello yaall, <DIV></DIV>> > >I am in Texas visiting my friend who's building an adobe. She's <DIV></DIV>> > >cement <DIV></DIV>> > >stuccoing the outside (not my idea) and I am talking to her about <DIV></DIV>> > >earth <DIV></DIV>> > >plastering the inside. The adobes are cement stuccoed together. <DIV></DIV>> > >Anything <DIV></DIV>> > >special about adobes.? She put lathing on the outside adobes. I <DIV></DIV>> > >don't want <DIV></DIV>> > >to do that. <DIV></DIV>> > >Any ideas or hints? Is it pretty much like plastering cob? <DIV></DIV>> > >Thank you kindly <DIV></DIV>> > >Ulani <DIV></DIV>> > >_________________________________________________________________ <DIV></DIV>> > >Get your FREE download of MSN Explorer at http://explorer.msn.com <DIV></DIV>> > > <DIV></DIV>> > > <DIV></DIV>> > <DIV></DIV>> > ---------------------------------------------------------------------- <DIV></DIV>> > Get your FREE download of MSN Explorer at http://explorer.msn.com <DIV></DIV><br clear=all><hr>Get your FREE download of MSN Explorer at <a href="http://explorer.msn.com">http://explorer.msn.com</a><br></p></html>
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