Win a copy of Herbal Medicine From the Heart of the Earth this week in the Medicinal Herbs forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • Pearl Sutton
  • James Freyr
  • Mike Haasl
stewards:
  • Burra Maluca
  • Joylynn Hardesty
  • paul wheaton
garden masters:
  • Greg Martin
  • Steve Thorn
gardeners:
  • Carla Burke
  • Jay Angler
  • Mike Barkley

RMH not using cob, but other materials

 
Posts: 8
Location: Windsor, ME
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I was just watching one of the videos about building a RMH with a wooden box and pea gravel and stone for the "cob".  
Can lava stone be used for the "mass" as well?
Suggestions for other materials that can be used to build in a single wide mobile home?

Thanks!
 
pollinator
Posts: 565
Location: Penticton, Canada
110
building solar woodworking rocket stoves wood heat greening the desert
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Welcome Moira,
If the lava stone has little voids like an Aero chocolate bar then they would be more insulative then heat gathering which is opposite of what you are looking for when it comes to a heat storage mass.
The cob can be used alone as a mass material but when it is only used as a mortar to fill the air gaps between more dense items like rock or urbanite (concrete chunks), the heat storage capacity can be increased. So really, you could say that you've built your mass with rock (or whatever) rather than cob.
Here is a previous discussion of some of the materials used in a RMH : What is the best material for a heat bank?
 
Moira Teekema
Posts: 8
Location: Windsor, ME
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thank you so much Gerry! :}  Still working on getting the bricks for building the core and still need to find out our building codes here in ME.  
Ciao for now!
 
When it is used for evil, then watch out! When it is used for good, then things are much nicer. Like this tiny ad:
A rocket mass heater heats your home with one tenth the wood of a conventional wood stove
http://woodheat.net
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!