Cob: Re: Re: Cob sticking to the foundation
Christopher Greenslade
Chris at vicgreen.fsbusiness.co.uk
Mon 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
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<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>