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Cob: Re: Re: Cob sticking to the foundationChristopher Greenslade Chris at vicgreen.fsbusiness.co.ukMon Nov 6 13:20:43 CST 2000
Traditional cob will always naturally adhere to lime stone plinths / foundations. I have not come across any cob properties here in England that have had any problems within this area. As long as the cob is applied to horizontal or stepped plinths / foundations downward forces should only apply. It should be remembered that the cob should be plumb, or cut back when dry to rectify any bulging etc.In no way should mass cob / blocks be laid on smooth slopes, whether repairs to cob or on plinths. Best regards Chris Greenslade ----- Original Message ----- From: Frances Grill To: pat at cobworks ; coblist at deatech.com Sent: Sunday, November 05, 2000 1:10 PM Subject: Cob: Re: Cob sticking to the foundation Greetings, Concerning the discussion of cob wall bonding or not bonding to it's footings;, not being a cob builder, it seems to me that central to the issue is that if the cob bonds to the footer, you will reduce the opportunity for water to pass through the water channel . For example in conventional construction the bond between a basement wall and footing takes place because of the bond between two like materials which helps to prevent seepage from the pooled water at the foundation.It would seem plastic between footer and wall would enhance the ability of water to enter the building...regardless of how much the wall weighs. It seems that two variables that need attention are 1) how monolithic can you make the structure and 2) how well can you keep water away from the foundation in the first place...or at least between the join between the wall and the footer. That's my two cents worth. Good luck --Original Message----- From: pat at cobworks <pat at cobworks.com> To: coblist at deatech.com <coblist at deatech.com> Date: Friday, November 03, 2000 10:31 PM Subject: Cob: Cob sticking to the foundation Coblist; I do not think that you will ever have a problem with the first layer of cob adhering to the foundation, be it rough or smooth. Of the two cob cabins I have built, the smaller one contained 120,000 pounds of stone, clay and sand. The second one contained 250,000 pounds. With that kind of weight the buildings will go no where but down. Patrick -------------- next part -------------- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content=text/html;charset=iso-8859-1> <META content="MSHTML 5.50.4134.600" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#c8e0d8> <DIV><FONT size=2>Traditional cob will always naturally adhere to lime stone plinths / foundations.</FONT></DIV> <DIV><FONT size=2>I have not come across any cob</FONT><FONT size=2> properties here in England that have had any problems within this area. As long as the cob is applied to horizontal or stepped plinths / foundations downward forces should only apply.</FONT></DIV> <DIV><FONT size=2>It should be remembered that the cob should be plumb, or cut back when dry to rectify any bulging etc.In no way should mass cob / blocks be laid on smooth slopes, whether repairs to cob or on plinths.</FONT></DIV> <DIV><FONT size=2>Best regards</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>Chris Greenslade</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=grill at vtc.net href="mailto:grill at vtc.net">Frances Grill</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=pat at cobworks.com href="mailto:pat at cobworks">pat at cobworks</A> ; <A title=coblist at deatech.com href="mailto:coblist at deatech.com">coblist at deatech.com</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, November 05, 2000 1:10 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Cob: Re: Cob sticking to the foundation</DIV> <DIV><BR></DIV> <DIV><FONT color=#000000 size=2>Greetings, Concerning the discussion of cob wall bonding or not bonding to it's footings;, not being a cob builder, it seems to me that central to the issue is that if the cob bonds to the footer, you will reduce the opportunity for water to pass through the water channel . For example in conventional construction the bond between a basement wall and footing takes place because of the bond between two like materials which helps to prevent seepage from the pooled water at the foundation.It would seem plastic between footer and wall would enhance the ability of water to enter the building...regardless of how much the wall weighs. It seems that two variables that need attention are 1) how monolithic can you make the structure and 2) how well can you keep water away from the foundation in the first place...or at least between the join between the wall and the footer. That's my two cents worth. Good luck</FONT></DIV> <DIV><FONT color=#000000 size=2></FONT><FONT face=Arial size=2><B>--Original Message-----</B><BR><B>From: </B>pat at cobworks <<A href="mailto:pat at cobworks.com">pat at cobworks.com</A>><BR><B>To: </B><A href="mailto:coblist at deatech.com">coblist at deatech.com</A> <<A href="mailto:coblist at deatech.com">coblist at deatech.com</A>><BR><B>Date: </B>Friday, November 03, 2000 10:31 PM<BR><B>Subject: </B>Cob: Cob sticking to the foundation<BR><BR></DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid"></FONT> <DIV><FONT face=Arial size=2>Coblist;</FONT></DIV> <DIV><FONT face=Arial size=2> I do not think that you will ever have a problem with the first layer of cob adhering to the foundation, be it rough or smooth. Of the two cob cabins I have built, the smaller one contained 120,000 pounds of stone, clay and sand. The second one contained 250,000 pounds. With that kind of weight the buildings will go no where but down.</FONT></DIV> <DIV><FONT face=Arial size=2> Patrick</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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