I just dropped the price of
the permaculture playing cards
for a wee bit.

 

 

uses include:
- infecting brains with permaculture
- convincing folks that you are not crazy
- gift giving obligations
- stocking stuffer
- gambling distraction
- an hour or two of reading
- find the needle
- find the 26 hidden names

clickity-click-click

  • Post Reply Bookmark Topic Watch Topic
  • New Topic

Pointers on finishing cob?  RSS feed

 
Bruce Woodford
Posts: 138
Location: S. Ontario, Canada
2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I am about half way through my first cobbing experience.... laying up a 6"layer of cob around a 7" steel RMH housed within a steel bell (a furnace oil tank).  The cobbing is a lot of work (when one is working alone) but I am happy that the completed portion is hardening and drying "hard as a rock" without cracks. I'm using a mix of 1 part clay (bought for $4.00 for half a ton! which seems to be almost pure clay, a light brown color) to 3 parts fine sand, a little less than 1 part water and maybe a 3/4 part wheat stubble and pine needle mix.  As I build, I'm also adding in a lot of small rocks to make the cob go further.

My main question is , How do you finish a cob project with a smooth or even shiny finish without sealing it so it can still "breathe" (allow moisture in and out)?

I'd appreciate any pointers from experienced cobbers.  Thanks in advance for your help!
 
Daniel Ray
pollinator
Posts: 139
Location: Stevensville, Montana; Zone 4b
21
food preservation forest garden hugelkultur
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
if you want to leave it as the cob look you can just sift you aggregate (sand) so that you use only fine materials. Most people make an earthen plaster to cover cob, same ingredients, finer materials. Make some samples of your clay, fine sifted sand, and sifted straw (chopped straw, goat hair, cattail fluff). Once the plaster hardens to a leather like consistency, burnish it til it shines. Use a yogurt lid or a very smooth stone. This will push the sand farther down in the plaster and bring the clay up to the surface to make it nice and shiny.
 
Bruce Woodford
Posts: 138
Location: S. Ontario, Canada
2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks so much Daniel. I appreciate the suggestions!
 
I agree. Here's the link: http://richsoil.com/email
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!