[Cob] Coblist Digest, Vol 5, Issue 139

[Jill Hogan]

I have used a cob roof. My website shows our leicthlehm roof but we have others that are nearly flat with water outlets in the parapets. The secret is that water must not stand any where it must run off. We have been through floods and I am the only person in town with no leaks.
Jill

Minimum energy for maximum production
McGregor Alternative Technology Centre "MAT"
www.mat.org.za
023 625 1533

  ----- Original Message ----- 
  From: Jack Simmons 
  To: coblist at deatech.com 
  Sent: Tuesday, September 25, 2007 9:19 PM
  Subject: Re: [Cob] Coblist Digest, Vol 5, Issue 139


  Pool or pond liner might work. Use adhesive to attach it to the plywood and leave enough liner as overhang to go partway up the inside area of the castellations to prevent any water that might be present, especially during a heavy rainfall, from penetrating the cob, Maybe use pvc through the cob as drainage holes too.

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  Today's Topics:

     1. roof suggestions wanted (hms.mommy at juno.com)
  From: hms.mommy at juno.com
  To: coblist at deatech.com
  Date: Tue, 25 Sep 2007 10:52:51 -0600
  Subject: [Cob] roof suggestions wanted

   Hi everyone,
  Like many of you, I'm hurrying to finish my project before the hard
  freezes.  It's a play castle, sides straight up, castellations along the
  roof--like a rook in a chess game.  The roof is going to be flat.  But, I
  am one who has little construction experience (yet!) so I'm looking for
  suggestions on how to do the roof.  I was thinking of using a piece of
  plywood, and I envision nestling it in at the bottom of the castellations
  and providing drainage pipes for runoff.  But what I don't know is what
  kind of material to use on top of the plywood to make it waterproof. 
  Ideally, one of the castellations would be more widely separated than the
  others, and I will provide footholds along the wall so the children can
  climb up to the roof.  So whatever goes on the plywood to make it
  waterproof should be something that can handle a certain amount of foot
  traffic.  Anyone have an idea what I can use? 
  Carrie


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