Thursday, February 10, 2011

Hemp Building Materials

Hemp (cannabis sativa) has course outer fibers and a shorter finer fiber on the inside,often called the hurd, The seeds from the hemp plant also can be pressed to get oil. These three main components of the hemp (cannabis sativa) plant can be manufactured into a variety of products that resemble wood, plastic, and even concrete like material. These hemp made products include but are not limited to plastic, fiberboard, wallboard, roofing tiles, insulation, paneling and bricks can even be made from the compressed inner short hemp fiber. The outer hemp fibers then can also be used like straw in bale construction paired with mud for an old-style cob building.

You can even make foundations from the compressed inner short hemp fibers. You fill a hemp plywood frame with the inner short hemp fibers, lime, sand, plaster and stone cement along with enough water to dampen the materials. It will set in a day and dry in a week. This hemp plaster/concrete is said to be half as light, seven times stronger and three times more pliable. Hemp reinforced concrete is also being tested and used to reduce the amount of concrete needed as well as gain the strength benefits of the strong long hemp fibers.

Homes can be made nearly 100% out of hemp materials. Pipes can be made out of hemp plastic. Walls can be hemp wallboard. Insulation can be made of hemp. It goes on and on… Hemp plaster, paint made with hemp oil, hemp carpet, hemp bricks, and even a hemp roofing material. We do not even list all the ones out there.

Building homes out of hemp will cost more than traditional materials until hemp is legal to be grown where you live but the outcome will be well worth the effort. Hemp building materials are better for you, withstand the test of time the same if not better than their non-renewable counterparts, and are easier on our environment.

Source: www.hemp.com

8 comments:

  1. What Gadget did you use to get your YouTube videos on your site? I'm trying to post one but i can't figure out how.

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  2. Hey Brad. If you add the html/javascript gadget it will allow you to embed data like YouTube videos into that space. On the YouTube page of the video you want to use, click the embed button under the video. Some let you copy the data, others won't. If you're allowed to copy and paste the data into your gadget. Once pasted you can adjust the video margins enlarging or shrinking it. Hope this helps you.

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  3. A useful aspect of using hemp is carbon sequestering. More CO2 locked-up in the process of growing and harvesting the hemp than is released in the production of the lime binder. Check out the links:
    http://inhabitat.com/hemcrete-carbon-negative-hemp-walls-7x-stronger-than-concrete/hemp-spray/
    http://www.lhoist.co.uk/tradical/hemp-lime.html

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  4. Hey Matt,

    Just wondering if you had done any research into fire protection with hemp. Through some of my reading I came across a section where the author discusses "Chopped hemp fibres, treated with borax for fire resistance, are used to produce insulation batts, and
    also as loose fill for floors and roofs." The article comes from "Materials for Architects and Builders - Third Edition" from Elsevier printing, written by Arthur Lyons.

    There are also some technical aspects discussed and also some great charts comparing a variety of traditional materials with some less utilized ones as well. Let me know if you need some help finding the book, I don't think the library at school has it.

    W

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  5. For sure Warren, I have been briefly looking into all of the different properties hemp walls possess, but am yet to concentrate on specifics ones. I know hempcrete in particular has high fire rating, although mostly due to the lime binder. As far as batt insulation and loose fill go, I need to collect further information. I found the book you suggested and will certainly use anything I deem applicable. Thanks for the info!

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  6. Thanks for the links Jeremy. I'll definitely be able to apply this to my research.

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  7. Hey, Matt.

    I found an article "Potential of structural pozzolanic matrix–hemp fiber grid composites"
    Hope it will help you.
    http://web.ebscohost.com.ezproxy.tru.ca/ehost/detail?vid=5&hid=126&sid=3fef529f-b8b0-4b16-b7da-b4a151b5f0b5%40sessionmgr111&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=a9h&AN=58539740

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  8. Hey Xiaoyang,

    Thanks for the reference you sent. I tried accessing it online, but it appears that the library doesn't think I exist. I'll have to sort that out this week and get my hands on that article.

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