[Cob] cracks in plaster

[Jill Hogan]

Hi Bob
Wemix all the sand clay and lime together, no presoaking and we mix it with our feet on tarps like we make cob. Seems to work best
Regards
MAT
023 625 1533
www.mat.org.za
We are sponsored by Cape Lime, Robertson.
  ----- Original Message ----- 
  From: Bob Smolen 
  To: coblist at deatech.com 
  Sent: Tuesday, September 16, 2008 9:41 PM
  Subject: [Cob] cracks in plaster


  Thanks Jill and Ron for your thoughtful comments.
  I reinspected the wall and there are only a couple of very minor cracks in the last lime/sand only layer. I am pleased.
  The earlier coatings were probably too clay rich as you suggest. I will experiment with a less clay mixture.
  I mix the lime and sand and clay at the same time. Is it necessary to soak the lime in water for days before mixing. My last coating seem ok so I believe presoak is not necessary. Can you comment on how you have done your plaster mix?
  Thanks,
  Bob 
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