new videos
hot off the press!  
    more about rocket
mass heaters here.

more videos from
the PDC here.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic

Cob Infill  RSS feed

 
Kate Nudd
Posts: 115
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I'm considering a project that would include adding a solar space to an exterior south wall of an existing house and replacing what's on and between the 2x4 studs of the back wall ( about 10 foot length of it)with cob.
Then on the inside of this wall have a rocket mass heater for heating the small home.
Will it work to infill with cob this way? Would the cob be too thin to stand up?
Has anyone done cob infill to act as thermal mass?
It would be plastered post infill both interiorly and exteriorly.There would be a door( with glass panel) to the solar space from the house as well as adequate venting in the solar walls and house wall.
All thoughts/input on this idea greatly appreciated.
Thanks
Kate
 
Jami McBride
gardener
Posts: 1948
Location: PNW Oregon
25
books chicken duck food preservation forest garden hugelkultur trees
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
It can be done with some type of reinforcement to 'hold' the cob in place, like chicken wire.
There is a guy up north repairing internal plastered walls with cob, so it's doable.

However, a thin cob wall won't be the 'mass' your looking for. So consider adding cob as the
floor of this solar room in addition to your wall.
 
Kirk Mobert
Posts: 145
Location: Point Arena, Ca
13
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I wouldn't do it.. Cob really should be built separate from wood members, they tend to reject each other if inter-penetrated.. I'd use light straw or something similar with the frame and put the thermal mass inside somehow.
 
Kate Nudd
Posts: 115
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks everyone
I had initially considered clay slip and straw but figured it didn't hold enough thermal energy compared to cob. I recognize that 4 or 5 inches of whatever I use isn't much but it is better than nothing. I think?
Clay slip and straw is still a possibility with earthen plasters on both sides.
Would adding medium size rocks throughout the clay straw mix add more thermal mass?
All input appreciated.
Thanks
Kate
 
Montana has cold dark nights. Perfect for the heat from incandescent light. Tiny ad:
Video of all the permaculture design course and appropriate technology course (about 177 hours)
https://permies.com/wiki/65386/paul-wheaton/digital-market/Video-PDC-ATC-hours-HD
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!