Hyper-wattle Update — 4 Comments

  1. Follow up. I just submitted a question, then found this from Patti S. from about 3 years ago: (I cut and paste below)

    Patti Stouter
    about 3 years ago1

    “So glad you’re moving up in the rankings, Harvey. This is a simple, practical solution that can really make a difference for slum dwellers. When the structural and R-value results come out, this is going to be way above most other ways of building. I’m still hoping to put second storeys of Ubuntu-blox on top of earthbag bases for Haiti. The only thing stopping me is that I need more detailed structural testing data to size the earthbag ground level walls.”

    She was considering the “second story” issue long ago. I would still love to hear your thoughts. Thanks

    • Harvey is using opposing rebar pins tied together through the wall. This method is incredibly strong. It can be used with thin wall earthbags, hyper-wattle, straw bales, etc. You can see Harvey’s Ubuntu blox earthquake test video on YouTube. It’s a real eye opener. This is the method I’d recommend. It’s basically double skins of ferrocement. You can even get engineering approval if needed.

  2. Owen, in reference to traditional earthbag technology, in the past you have advised against building two story houses in earthquake prone Haiti. I understand that–8 ft high of heavy earthbags is one thing, 16 ft high is something else! And I believe you allowed the light weight second stories built of things like bamboo might be ok. Upon initial investigation, I could not find indigenous construction grade bamboo in Haiti.

    Might the hyper wattle skins on straw or trash bags be a way to construct two story homes in Haiti? Might a second story of these light bags be likely, or would you prefer to only use the light bags as the upper half of a one story building?

    I ask because some in Haiti to whom I have shown your house plans prefer the two story ones. While you likely can’t say until all the research is in, do these lighter walls hold hope for second stories in Haiti houses?

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