[Cob] plaster over plywood & lathe

[howard at earthandstraw.com]

Works well for the interior but may want the plywood on the exterior...or not.    
You could use a wood lath or a reed lath fastened to the studs instead.  
You could use coppice as in waddle and daub as well.
If you sue plywood on the exterior you could do light clay straw in the studspace and plaster on that.


Howard Switzer, Architect
668 Hurricane Creek Road
Linden, TN 37096
931-589-6513
www.earthandstraw.com
  ----- Original Message ----- 
  From: Ocean Liff-Anderson 
  To: coblist at deatech.com 
  Sent: Sunday, June 07, 2009 9:37 PM
  Subject: Re: [Cob] plaster over plywood & lathe


  Kiko did some earthen-plaster-over-standard-studwall construction  
  here at FireWorks.  He likes to put up drywall, then apply the  
  earthen plaster directly to the cardboard surface of the drywall...

  Seems to have worked pretty well.  Though this is an interior  
  application, no exposure to weather.


  On Jun 7, 2009, at 6:35 PM, Tys Sniffen wrote:

  > I'm doing some internet reading, but I thought I'd ask here too:
  >
  >
  >
  > I've got some parts of my cob house that will be NOT cob; I intend  
  > to put
  > plywood on either side of insulation, and use an interior plaster  
  > on the
  > inside, and the exterior plaster (same as goes on the cob) on the  
  > outside.
  >
  >
  >
  > Two questions:
  >
  > Think I need a vapor barrier (sheet of plastic) INSIDE the wall to  
  > somehow
  > stop vapor from traveling through/into the wall? (since other cob  
  > parts of
  > the house will be 'breathing')
  >
  >
  >
  > And,
  >
  > Do you think I need some sort of tar paper or some other protection  
  > for the
  > plywood underneath whatever sort of lathe I use? (I'm still up in  
  > the air
  > about metal lathe vs chicken wire vs burlap)
  >
  >
  >
  > Tys
  >
  >
  >
  > Choose your own provider with no waiting periods with Spirit Dental  
  > and
  > Vision Insurance at
  >
  > www.spiritdental.com
  >
  >
  >
  >
  >
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