Adobe in Action Interior and Exterior Plastering Online Course Begins on Monday, Sept. 1st

OLYMPUS DIGITAL CAMERA
Adobe master Kurt Gardella, the man behind our backyard oven, is teaching an online adobe plastering class. Here’s the 411:

Dear adobe friends,

The next online class I am teaching for Adobe in ActionInterior and Exterior Plastering – begins on Monday, September 1, 2014. Earthen plasters are a great way to finish just about any wall substrate in the home. They create a soft, breathable final plaster layer which regulates humidity, odors and sounds like no other wall finish can. Plastering is a great way to get a feeling for building with earthen materials because the thin plaster surfaces give us direct and immediate feedback on how well we’ve selected and mixed our clay and aggregate materials. Also, you can practice your earthen plastering skills over existing conventional walls if you wish. We’ll show you how!

Here is the direct registration link if you are interested in joining us:

http://adobeinaction.bigcartel.com/product/interior-and-exterior-plastering-8-week-online-class-from-september-1-to-october-26-2014

And here is some info about topics covered in the class:

About the Course

This course covers the fundamentals of finishing interior and exterior adobe brick walls with natural plasters and paints. Our hands-on projects for this course focus on the mixing and application of earthen plasters, lime plasters and lime/casein paints.

Topic Overview

  • historical overview of interior and exterior finishes for adobe structures in New Mexico
  • importance of respiratory and eye safety when preparing and mixing plasters
  • overview of mud plaster characteristics and why earthen plasters make sense on adobe walls
  • summary of tools and materials needed for plastering
  • window and door opening reinforcement using reed mat
  • adobe wall preparation for maximum earthen plaster adhesion
  • locating and testing clay for earthen plasters
  • locating and testing aggregates for earthen plasters and lime plasters
  • preparing lime putty 10 importance of work site and material organization for plaster work
  • fiber (straw) preparation and chopping techniques
  • sifting & preparing & mixing soil and aggregates for earthen plasters
  • wheat paste production for strengthening mud plasters
  • casein production for lime paints
  • natural exterior earthen plaster stabilization techniques (lime, cactus juice)
  • hand application techniques of earthen plasters (base coats, patching)
  • hawk & trowel application of earthen and lime plasters (leveling and finish coats)
  • basic earthen plaster ingredients and recipes
  • basic lime plaster ingredients and recipes
  • calculating surface area to be finished and materials needed
  • troubleshooting earthen and lime plasters (cracking, adhesion problems, etc.)

Let me know if you have any questions. It would be great if you joined us for this next class!

Best,
Kurt Gardella
www.kurtgardella.com

P.S. For more information about how Adobe in Action’s online classes work see:
http://www.adobeinaction.org/how-the-online-classes-work/

A More Graceful Dome

Image: Adobe Alliance.

Image: Adobe Alliance.

Kurt Gardella, the gifted adobe builder and instructor who built our backyard earth oven, left a comment on our geodesic dome post pointing out that earth is a better material for dome building.

The problem with wooden domes is that plywood and other sheet-based building materials, in the US, come in 4 by 8 foot sections. You end up wasting a lot of wood to make a dome. Building with earth solves this problem.

swanhouseintvaultbymartinjulien

It’s also beautiful. Earth building offers the opportunity to do more graceful forms than can be accomplished with sheets of plywood. The example Kurt linked to is a house built by Simone Swan. You can see more photos of Swan’s house at the Adobe Alliance.

Journal of the New Alchemists

Screen shot 2014-04-24 at 10.30.39 AM

“Six-Pack” Backyard Solar Greenhouse, 1975. Image: Journal of the New Alchemy.

After reading an article by Paul Ehrlich, “Eco-Catastrophe!,” Nancy Todd turned to her husband John and said, “We must do something.” The year was 1969 and the Todds along with Bill McLarney went on to found the New Alchemy Institute.

History repeats itself. What the New Alchemists did, in response to the 1970s era energy crisis and political instability, sounds a lot like what people have been up to since the 2008 economic bubble: aquaculture, organic gardening, earth building, market gardens, no-till agriculture, old timey music, wind power, four season growing, permaculture, non-hierarchical leadership and goats. Only the 1980s era of appropriate technology amnesia separates current efforts from the work of the New Alchemists.

Screen shot 2014-04-24 at 9.08.03 AM

Aquaponic system. Image: Journal of the New Alchemy.

By accident I discovered the Journal of the New Alchemists deep in the closed stacks of the Los Angeles Central Library. As revealed by their journal, what distinguishes the New Alchemists from other efforts of the time is the Todd’s science background. The Journal has a refreshing research-based approach to its subject matter. The period I reviewed (their last decade of publication) covers mostly their agricultural experiments, but occasionally dips into urban planning and other subjects.

Screen shot 2014-04-24 at 9.08.32 AM

Biodome. Image: Journal of the New Alchemy.

It’s interesting to look back at their work to see what ideas went mainstream and what faded away. What didn’t stick is what Nassim Taleb would call “top-down” approaches to design epitomized by the 70s fixation on geodesic domes and self contained ecosystems (though we’re starting to see a resurgence of the latter via a renewed interest in aquaponics). The more bottom-up work of refining conventional organic agriculture through no-till farming and integrated pest management had more long lasting influence. One could make a good argument that you need the domes and aquaculture schemes to inspire people to work on the more prosaic stuff. But another criticism of the appropriate technology movement of the 70s is that it focused on technology rather than social and political problems (see economist Richard S. Eckaus article “Appropriate Technology: The Movement Has Only A Few Clothes On“). We may be in the midst of repeating that mistake.

Screen shot 2014-04-24 at 9.06.48 AM

Aquaponic system. Image: Journal of the New Alchemy.

One does not need to wander the closed stacks of the library to find the amazing Journal of the New Alchemy. Thanks to the internet you can download the New Alchemist’s publications as pdfs. Aquaponic enthusiasts will find much information. The Journals are a fascinating read and gave me a great deal of respect for the founders of the New Alchemy and their many contributors (one issue features a young Gary Paul Nabhan). They went far beyond talking the talk and walked the walk. They did something.

Bread Ovens of Quebec Free e-book

outdoor-bread-oven-flat-roof

North American has two regions famous for oven building: New Mexico and Quebec. The design of the ovens of Quebec have their origin in much older French ovens. The Canadian Museum of History has posted an amazing, out of print book, Lise Boily and Jean-François Blanchette’s 1979 book The Bread Ovens of Quebec, in its entirety online. The book includes the history of the Quebec oven, how to build an oven, bread recipes and even “popular beliefs, spells, incantations, and omens” associated with ovens.

I’m really happy with the adobe oven we have in our backyard–it has produced many a tasty pizza and I look forward to having people over to give me an excuse to fire it up. Ovens, in Quebec households were associated with life itself and I understand why.

If you’re interested in more information on DIY ovens, I’d recommend The Bread Ovens of Quebec along with Kiko Denzer’s Earth Ovens and Alan Scott’s The Bread Builders (brick ovens).

If you’d like to see an oven built in the Quebec style, these folks have posted their experience of building one.

Learn to Build with Adobe

650-adobeBricks

Kurt Gardella made me an adobe convert and helped us build an oven in our backyard that is responsible for many delicious pizzas. I’ve taken a few classes he’s taught, both in person and online. If you want to learn adobe, Kurt’s your man. Here’s some info on upcoming classes he’s teaching:

Are you looking for college credit for your adobe construction coursework? I am teaching the following spring 2014 semester classes through Santa Fe Community College’s Adobe Construction Department:

Class: ADOB 113 – Passive Solar Adobe Design
Format: 8-Week Online Class
Dates: January 21 to March 15, 2014
Credits: 2
Course #: 31660

Class: ADOB 111 – Adobe Construction Basics
Format: 8-Week Online Class
Dates: March 24 to May 17, 2014
Credits: 3
Course #: 31268

Class: ADOB 112 – Adobe Wall Construction
Format: Web-Blended (4 Weeks Online + 2 Days of Intensive Live Instruction)
Dates: April 19 to May 17, 2014 (class meets on campus Saturday, April 19 and Sunday, April 20, 2014 9am to 5pm)

Location: Trades and Applied Technology 815
Credits: 3
Course #: 31661

For more information on course fees and registration see:

www.sfcc.edu/registration/tuition_and_fees
www.sfcc.edu/registration/first_time_students

Please e-mail me directly at [email protected] if you have any questions or need further information about any of the above classes.

For more info visit: www.kurtgardella.com

Extreme Low-Tech Communication

PowerSupply-large

This has to be the ultimate achievement in low-powered long-distance communication. Ham radio operator Michael Rainey, AA1TJ, transmitted a message over a distance of over 1,000 miles by yelling Morse code with his own voice into this primitive home-made transmitter, nicknamed “El Silbo.” No power was used other than that generated by his own voice vibrating the microphone (which was a re-purposed speaker).

If you want to build your own here’s the circuit schematic and more details.

And here’s Rainey, back in 2009, using El Silbo:

On a side note, can we please apply Ham radio’s level of detail and open source spirit to the world of backyard vegetable gardening?

It’s official: I’m a Ham

How blog posts will be issued from now on. Image: Library of Congress.

How blog posts will be issued from now on. Image: Library of Congress.

It’s been on my to-do list for years–get my ham radio licence. I took a six week class offered by the Pasadena Radio Club to study for the technician class licence and on a whim crammed for the general class. I passed both tests and as of yesterday am now also known as KK6HUF.

Many thanks to W6MES, who volunteered his time to teach the class and to the major memory system for helping with all those numbers. It was a lot of fun to review basic math and electronics.

So why do this in an age of Skype and cellphones? I find the DIY ethos of ham radio empowering. We are surrounded by electronic devices and it’s good to know a little something about what’s going on “under the hood.” I wish I had discovered amateur radio when I was younger–I might have struggled with math less had I had a hobby to motivate studying.

My interest in appropriate technology was another reason. There is a ham I met online who is constructing a website that will be of interest to readers of this blog–he was inspired by John Michael Greer’s writing on ham radio. I’ll share that website when it’s ready to go public.

Passing the test was easy, but I’ve got a lot of work to do. I have no radio, nor do I have any experience using one. And I’d like to learn morse code. I’m all ears if any of you have advice.

Primitive Grain Storage Technique

Screen Shot 2013-11-02 at 11.17.50 AM

When thinking about technology, I like to play with the idea of what is the absolute minimum you need to get the job done.  This may be because I’m not very handy at building things, but yet have survivalist tendencies. So while I’m pretty sure I’ll never actually have any need for these skills, it’s fun to think about how I’d get by in a DIY world.

So I was delighted when I ran across this minimalist grain storage technique on the BBC documentary series, A History of Celtic Britain (2011), hosted by Neil Oliver of the Delicious Scottish Accent. (I am watching it on YouTube. Fingers crossed the BBC will not take it down before I finish it!)  I love this technique because while it is simple, it is far from stupid.

The technique is described by the Dave Freeman of the Butser Ancient Farm in Hampshire, where they’ve been experimenting with grain storage iron-age style (c. 400 BCE.).  Turns out all you need to do is dig a pit in the soil. The pits they dug are circular, and look to be 2 or 3 feet in diameter, and maybe 3 or 4 feet deep.

So you may ask, how can you pour grain into a hole in the ground and expect it to keep? The secret is a clay cap on the top. In the screen grab below you can see the cap and some feet for scale:

Screen Shot 2013-11-02 at 10.39.12 AM

If you go to YouTube,  you can watch this sequence starting around 52:36, but what Freemen says is that when the grain goes in the pit and is sealed with a clay cap, the clay blocks out moisture, air and light. Moisture is still available at the sides and bottom of the pit, of course, especially as they are in green Hampshire.

The grain touching the sides of the pit sucks the moisture out of the soil at the edges, and uses it to attempt to germinate. The germination process sucks up oxygen and releases carbon dioxide, effectively clearing the chamber of oxygen. At that point, as Neil puts it, “Time stops.” Nothing can grow, nothing changes. The grain cache keeps for at least a year, perhaps two years, and provided a very handy safety backup for hard working iron age farmers. And some very basic appropriate tech for modern armchair survivalists to ponder.

Farm Hack

farm hack

Farm Hack is an innovative blog that synthesizes high tech and low tech in the service of growing food and community. The blog is run by the National Young Farmers Coalition. While geared towards agriculture, many of the posts will be of interest to backyard gardeners. Recent subjects include a project to develop an infrared camera to monitor plant health, smartphone tools for farmers and open source appropriate technology resources. It’s exactly this kind of innovation that gives me great hope for the future.

Thanks to Tommy Berbas for the tip.