bearing. To insulate earth-filled bags it is best to add a separate layer on the outside, which could be commercial foam, papercrete, light straw/clay or even strawbales or more bags filled with insulation.
Just a quick update to this thread. We are currently working on a two-room round house that has a small dome (mechanical room) attached. We did find a good clay/sand mixture that we purchase by the truck load. We're hoping to get the great room and bedroom completed enough to move into by late October and then next Spring we'll be adding on a master bedroom.
I really wish we could use our "dirt" locally we call it "moon dust" it's actually very fine granite dust. [/quote]
You also mentioned finding a replacement for Portland cement..
So just a little shout out for geopolymer: I have played with geopolymers a few different ways, and I was impressed with it. you may find a desirable use for it, using your granite sand and limestone aggregates-- if you can come up with cheap waste pozzolan. Something to consider while you
Thanks for your thoughtful replies. I am planning a meeting with the manager of the local limestone quarry here. Scoria is just not available within any driving distance that we can afford or, afford to have delivered. We can purchase small amounts at the building store an hour away but that won't be economical for building the entire dome complex. We are using Owen Geiger's Eco-Dome II plans. I do already have near 1,000 poly bags so if I decide to go that route we have
more mold resistant. is a vermiculite-crete without cellulose fill to expensive? I like lightweight cretes, scoriacrete And pumicecrete and epscrete and papercrete have all found appropriate uses in my
. is a vermiculite-crete without cellulose fill to expensive? I like lightweight cretes, scoriacrete And pumicecrete and epscrete and papercrete have all found appropriate uses in my work but I have never
(note: there are links to blue underline text and Kanji)
Hi Jeremy, et al,
"Vernacular" can address both a specific region, historical time period, and/or biome type. It is neither fixed towards a single cultural type, yet more specific to what works "historical" in a region and/or biome. One could just follow a "native" tradition and adapt that to their needs or look to other cultures and forms from similar regions and/or time periods. New England has
As Jeremy points out, the vernacular architecture of an area was shaped by the lifestyle, living standards, and available resources/skills. There is absolutely a lot to be learned, but in many cases some or all of these things have drastically changed, and improvements can be made. I think a west-coast cedar longhouse is an excellent structure, but if I was building one, I suspect I would be planning on substantially updated foundations along with insulation, and passive/active HVAC options.
Thanks for weighing in. I've read your responses to other similar posts on this forum and have seen this suggestion from you a few times. I might be misunderstanding, but as I recall from my high school history class, the "historical vernacular" of the native peoples of this region were green poles lashed together with layers of animal skins draped over them and open fire pits under a central skylight. As they were primarily nomadic people, this made sense for them, but doesn't
I have considered timber framing. In fact, that's one option I'm thinking of for a self-supporting roof, with posts either inside or outside the earth bag wall. I think a lot of the strength of the earth bags would be lost by interrupting it with posts, so I want to keep that EB wall continuous and just work around the post and beam construction to support the roof.
I think the soil is pretty heavy in clay. I haven't tested it fully yet because I don't yet own it. I'm in the process of
Dale: Interesting, wouldn't have occurred to me that this would be too northerly for earthbag construction. Having followed the http://canadiandirtbags.com/ blog, they seemed satisfied with a singlewalled! earthbag setup in Alberta. Is this purely an insulation thing, or are you thinking about some other shortfall?
Sites that might help you find a better source of perlite/vermiculite:
I've looked into perlite and vermiculite, but I might not be looking in the right place. All I've seen is bags at gardening centers, etc. for about $.75/cubic foot. That would obviously get pretty expensive to fill a wall with. I do have plenty of wood, though. The entire lot is wooded, and we'll have to clear a bunch just to have a place to build, so maybe with a decent wood chipper, I could use that mixed with clay, which I also have plenty of. Or, there's a sawmill down the road where
But the stage in strawbale where the bugs come out of the walls looks so fun!
So, no scoria, no rice hulls, no pumice. What else can you put in an bag to insulate?
Have you looked for perlite or vemiculite already, as well?
Beyond those, my first thought was wood. Perhaps lightclay, or in a pinch maybe sawdust mixed with lime? Looks like this is on Owen Geiger's mind too: http://www.naturalbuildingblog.com/woodchiplight-clay-earthbags/
While PC is fun, lightweight, fire-retardant (it dissolves rather than inflames), it is also very absorbant, loves to drink up the moisture. Unless the permies/builders have come up with an affordable, 100% guaranteed against absorbancy mixture, I would not use it for your support walls, especially not underground.
But, it does make for a nice insulating plaster to finish out your home.
I hope someone with deeper research with newest technology (resins, etc) will correct me and give