Win a copy of For the Love of Paw Paws this week in the Fruit Trees 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 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
  • paul wheaton
stewards:
  • Jocelyn Campbell
  • Mike Jay Haasl
  • Burra Maluca
garden masters:
  • James Freyr
  • Joylynn Hardesty
  • Steve Thorn
  • Greg Martin
gardeners:
  • Carla Burke
  • Dave Burton
  • Pearl Sutton

Finishing earthbags with shotcrete?

 
Posts: 252
Location: Nevada
8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Is it possible to finish the interior of an earthbag house with shotcrete? It would probably need rebar.
 
Posts: 1444
Location: Fennville MI
42
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
For me this begs the question, why? At both ends, so to speak. Why use earthbag construction and then put a reinforced concrete shell inside:? Why put a reinforced concrete shell inside an earthbag structure? And the questions are different, in fundamental ways.
 
Tom Connolly
Posts: 252
Location: Nevada
8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I see your point. Maybe I should ask the question - is it possible to find an interior coating that can be sprayed on instead of applied by hand, to speed up the process? I read of people needing a couple to a few weeks to put up their bags and then the same amount of time or longer to put the clay/stucco, etc on the inside and outside. Is it possible to prepare a clay or stucco so that it can be sprayed onto the surface? Hempcrete?
 
pollinator
Posts: 267
Location: Ozarks
64
homeschooling goat dog tiny house chicken cooking building solar wood heat homestead
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I would think the same equipment could be used for mud plaster as for shotcrete/gunite etc. There's usually chopped straw in the mud plaster which might clog the gun though. If you put stucco mesh up, the straw might not be needed or could at least be chopped very short. You could attach tie wires to the barbed wire between the bags and leave them sticking out to tie the stucco mesh to. Poultry netting has also been used in place of stucco mesh. Cheaper I think.

Or you could hire a bunch of kids for a weekend or two to make and throw mud.

Something as rigid and unbreathable as concrete might not be very compatible with earth filled bags. The moisture would never be able to come out of the earthbags so it would never get as strong as it's supposed to be. The curing of the walls can take a very long time depending on climate and sealing them up would prevent it.
 
John Pollard
pollinator
Posts: 267
Location: Ozarks
64
homeschooling goat dog tiny house chicken cooking building solar wood heat homestead
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Get a hold of this book:
Earthbag Building: The Tools, Tricks and Techniques
Kaki Hunter, Donald Kiffmeyer

They took the time to get earthbag building down to a smooth routine. Kaki's got 20 years in alternative building and Donald about the same in standard construction.
 
Posts: 64
Location: Cranston, Rhode Island
3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

John Pollard wrote:Get a hold of this book:
Earthbag Building: The Tools, Tricks and Techniques
Kaki Hunter, Donald Kiffmeyer



I have a copy, if anyone wants it.
 
Posts: 2413
46
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Modern OPC in general is a hideous building material on just about every level...

OPC never (or I know of none) when tried to make work with a natural material performs well, and all too often causes way more issues..

Earth bags in general can create a wall that is one of the least permeable of the "new" natural building modalities to rise up in the last few decades. I do feel it may have its place in some areas, yet feel, in time it will go the way of "geodesic domes" and only have a cult following, as when vernacular building systems are looked at for a geographic region compared to "bag architecture," the ergonomics will always lean toward the vernacular systems in means, methods and materials.
 
Posts: 120
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Tom: I've sprayed earthen plaster, Papercrete, epscrete, lime, pumice/Portland and mixtures of these binders/aggregates. Just plaster prep as needed for the pitch and stickiness of the plaster. Though Portland doesn't breathe...
Jay: the woven bags let moisture breathe out, they are permeable. I doubt much difference than EB or RE or CEB.
EB Chris
 
You save more money with a clothesline than dozens of light bulb purchases. Tiny ad:
Switching from electric heat to a rocket mass heater reduces your carbon footprint as much as parking 7 cars
http://woodheat.net
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!