"If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.” - Thoreau
I will probably have a soil test done
Paramount Natural Design-Build Architect, Engineering Services, GC, LLC.
Paramount Natural Design-Build Architect, Engineering Services, GC, LLC.
Paramount Natural Design-Build Architect, Engineering Services, GC, LLC.
Robert Alcock wrote:Hello Philippe
Personally I wouldn't use post-and-beam in conjunction with a cob wall. The cob and timber move and expand-contract differently, inevitably causing cracks. Cob is load-bearing on its own. As are straw bales, but again, they tend to move in a different way. Also straw bales require very rigorous protection from the weather in a damp climate like Portugal's (I believe -- we are in Cantabria, which is very damp.) Straw bales (well protected) with post and beam, or else cob on its own, are good options.
If you use posts, they should go on top of something that won't let water seep up through it. Like a tyre or two, full of rocks.
Foundations: For the stemwall (between ground and ~50cm above ground) I suggest you try tyres filled with rocks. The drainage trench doesn't need anything to line it and definitely no cob between the rocks, but a piece of geotextile or equivalent on top of the trench could help to stop it silting up. Just chuck the rocks in and tamp them down, the more space the better.
Good luck. See our website http://abrazohouse.org for more info...
best
Robert
Terry Ruth wrote:BTW: Once we understand your soil better it may improve the burn rate of your wood in case of fire which will lower your home owners insurance and save lifes. If your using combustible appliances or high load HVAC, utility fossil fuels, your whole concept of eco-frendly and saving the planet just went through the roof. More than compared to OPC production. I'd need to see the complete design. If you have not done the embodied energy math you may be out on a limb with your reasoning. I'm guessing you have not done that math and your best choice for a hybrid wall design is natural concrete if you know how to design it. Hybrid wall designs do not do well structurally. Monolithic mass of the same mechanical properties is a better choice. Recycled concrete can create point loads, not good structurally. You will need to look at the wall loads from roof loads and design the foundation according to them which creates a hybrid loaded foundation mess.
"If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.” - Thoreau
No not I do necessary agree without seeing a soil test and plan. I suggest you post them before taking any more advice. COB can have issues both internal and external, depending on compression and shear values and other physical properties. Due to the ductile core strawbale would be a much better choice in seismic events. In general take advice on how to build from builders, take advice on how to design from Engineers. $3-500 covers soil test here, money well spent. Then you need someone that can interpret the data and design accordingly. Another good thing to do after that is a build your temp structure out of what the main home will be. Before any building cut some core samples out of a test wall and take them back to the lab to get compression and shear. Use those values to design to your loads. Do not guess and use a safety factor of 2 in the designDo you agree with Robert that even a roundwood structure with cob walls will cause problems?
Paramount Natural Design-Build Architect, Engineering Services, GC, LLC.
"If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.” - Thoreau
Also, the roundwood posts that support the roof will rot when put underground, right? I've read on Tony Wrench's website (thatroundhouse) that the 'new' method is placing the posts on 'pads'. What are these pads exactly? Can someone explain this process please? Should I still treat the (bottom of the) wood with something (creosite)?
..faswall blocks, and many other *sort of concrete*
Paramount Natural Design-Build Architect, Engineering Services, GC, LLC.
Terry Ruth wrote:
..faswall blocks, and many other *sort of concrete*
Faswall and Durisol contradicts alot of what has been written on this thread. That is a wood chip, clay, magnesium chloride product. The mag chloride and clay binders have 100% petrified the wood & sand aggregates and the small amount of portland cement gives it additional strength. It is engineered by a proprietary process similar to nature, very difficult to duplicate unless you are a chemist. It has proven itself as an excellent healthy wood based foundation for centuries or since wood became petrified. I suggest learning more about these product types and natural concretes. They also make excellent walls and roofs.
Paramount Natural Design-Build Architect, Engineering Services, GC, LLC.
"If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.” - Thoreau
"If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.” - Thoreau
"If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.” - Thoreau
It's a beautiful day in the tiny ad neighborhood
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