Boots on the Ground: Why doesn't everyone build with rammed earth?
Part of "High Performance Design Meets Boots on the Ground" - Toronto Ontario, March 11, 2020.
Presenter: Sylvia Cook, Aerecura Sustainable Builders
A decade ago, Sylvia made a shift from teaching Physics to sustainable building, following a lifelong passion for environmentalism. Rammed earth now forms the core of that passion as she works to use its potential for changing the building industry to incorporate sustainability, energy efficiency, low embodied energy and fundamental social justice.
“Why doesn’t everyone build this way?” is the most frequently asked question by visitors who come to tour our rammed earth home. This talk explores answers to this question, including: unfamiliarity with this material, despite its ancient history and widespread global use;;concerns about ‘dirt’ being susceptible to our climate, rather than the stability of re-created stone
fears about building a ‘mud hut’ instead of a modern building with upscale potential;beliefs that any form of sustainable building involves sacrificing comfort, whereas rammed earth provides comfort far beyond the usual standardwith consistent temperature, humidity and excellent indoor air quality; alternative building methods, including rammed earth, are expensive, without consideration of the total human, societal and environmental cost of projects.
Syvlia Cook is a rammed earth builder: A decade ago, Sylvia made a shift from teaching physics to sustainable building, following a lifelong passion for environmentalism. Rammed earth now forms the core of that passion as she works to use its potential for changing the building industry to incorporate sustainability, energy efficiency, low embodied energy and fundamental social justice.
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I live in Texas and nearly all of the RE builders will tell you banks will not fund this because they cannot get the appraisal data. You need 3 comps in the last 6 months within 15 miles of where you will build. So unless you have all the cash to complete the house, you will be building this yourself. Its a shame that they all say they want sustainability but they're not willing to finance it.
How do you hang pictures on the walls? Can you patch the walls from like nail holes etc.?
Statistics and figures would be helpful in making a decision
watching here from the future, where the price of traditional wood building has skyrocketed, but this has stayed the same
You need to do a bit more research about thermal mass and how it works, because thermal mass without insulation is not a good idea, specially in climates with long cold winters and short cloudy days. It's similar to a battery and it can be "charged up" with both heat and cold. When the air is hotter than the thermal mass, then it radiates the stored cold, and when the air is colder, then it radiates the stored heat. Basically it acts like a damper to any changes in temperature and it gives a big lag (depending on the thickness) until the changes from the outside can be felt inside. So if you have a month long cold period, in which the sun doesn't have enough power and time to heat the mass enough as to compensate with the loss during the night, your house will get very cold at some point down the line and it will get almost as cold as the outside (it does insulate a bit). If you want to heat it up, well now you have a problem because you need to charge the walls up with heat and that will take allot of fuel and once you got them charged up you need to keep them that way if the sun cant do it for you, because the uninsulated wall will bleed allot of that heat to the outside. The situation is better in summer because you have the shade to help you out, specially if you design the roof in such a way as to block the sun from falling on the walls in summer, but let it through in winter, but the principle is the same. The ideal locations for thermal mass based houses is in climates and areas in which the loss of heat during the night is balanced out by the gain during the day, same goes for loss/gain of cold. If this balance is not struck, then you will have to compensate by heating/cooling the house and the more extreme the unbalance is....the more you have to compensate. Best solution for any area outside the ideal one, is to have insulation on the outside with thermal mass on the inside, in which the thermal mass inside is heated by the sun in winter and shaded in summer. Even so, you're still going to need to "help" things out a bit in winter and possibly even in summer if you get hit by a long heat wave. Thermal mass by itself is not a miracle solution (except the ideal context), but inside a carefully designed system it can be very effective, on par with consecrated contemporary solutions with the added bonus of being friendlier to the environment, by a huge margin.
Its hurricane and tornado resistant,the reason is people in central Kentucky lost so much, and mow we are in a weather apocalypse
No you can’t patch walls without spoiling the look. Plus it is incredibly expensive. I built one feature wall, 20 feet long, 12 inches thick, 12 feet high. Cost $60,000.
This is inspiring and makes me want to enter this world and begin at once to impact my community with this information.
Perfect for a global pandemic collapse
I wish she would just give us the facts and not try to be a comedian/irritated by all those questions and comments people make
Thank you very much for sharing this. I'm from Turkey and I'm very much interested in natural building materials. We have a very diverse type of natural building culture across Anatolia but unfortunately, they are being replaced with concrete nowadays. I appreciate any work and effort to spread natural buildings around the world. I hope more people will get back to this type of building system.
Very good, appreciated 👍🏻 thank you for such a wonderful message 👍🏻
I've been trying to get my head around ths for a while, but now you've used the analogy of sedimentary geology, I get it. Thankyou.
I love earth and wood colors so I love the natural look of rammed earth. I didn’t catch where in Canada you are, but I’m in Fairbanks Alaska, and it can routinely get -40 here with much colder extremes. Do you put a core of foam insulation in the walls? And what do you use for the water resistance and the strength stabilization you mentioned? Even more than the cold I wonder how well it would resist earthquakes. Thank you!
Excellent presentation and insight 👏👌👍. Do you have website and other similar videos?
Can it handle a green roof? How about repairs or moving an outlet?
Awesome work, thanks for sharing. Please how well would rammed earth wall do in Nigeria with a wet-tropical type climate with mean annual temperatures of 27-34 degrees?
The material of my dreamed house
beautiful walls!
What is the axial capacity under compression strength for this type of walls also where is the steel reinforcing for lateral stress . Is there any study or test performed on this type of walls .