About Charlie

I run the Natural Building and Forest Gardening courses at this site and also maintain this website.

Eyliese’s Internship

Hi, and please welcome Eyliese, who just finished a two-month natural building internship with me here in San Marcos La Laguna, Guatemala. Here is her version of the encounter:

Hello, my name is Eyliese Jiunta and I am currently an undergraduate student at Green Mountain College in Poultney, VT majoring in Renewable Energy and Ecological Design.  My studies concentrate on the economics, policies, and applications of renewable forms of energy, as well as design of products, buildings, and systems that aim to emulate ecological systems of sustainability. Basically, I learn how to design things in a sustainable way, and learn enough about renewable forms of energy, mostly solar (PV and Solar Thermal systems) to be able to implement them into my designs as well as understand their place in the world and how to make that place a little easier to attain. I like to think that I’m learning to design for a better future, however cliché that sounds.

The best part of the Renewable Energy and Ecological Design (REED) program, in my opinion, is the empowering ability to take a design, whether it be for a bike trailer, or a solar garage/vehicle charging station that you’ve created, and to have the ability to see it through its design, prototyping, and finishing phases. There is nothing more satisfying to me than to begin with an idea that can help solve one problem, small or large out there in the increasingly toxic world, and to take that idea and back it up with real research, data, trial and error, and to create a beautiful solution from it. This is what gets me excited. This is the outlet that I’ve discovered for my inherently artistic way of looking at the world, coupled with my desire for solutions to be practical and simple.

As a part of my program, I am required to complete an internship during the summer between my junior and senior years.  The internship is supposed to give real world experience in the field of our choosing, as well as a glimpse into how others are out there designing solutions. Lucky for me, I managed to land an incredible opportunity working with Charlie Rendall in the highlands of Guatemala, learning the intricacies of bamboo, plaster, and earthen building, how to best deal with the unique policies that surround construction here, how to project manage like a pro, and how to always embrace a design opportunity that crops up, however small.  Basically how to build with a sustainable material, run a tight ship, and manage to still have fun with it.

Charlie currently has quite a few projects underway: a Tai Chi Temple, a medical clinic, a Yoga Studio, a hotel, and a few various others. Quite the spread of different applications for bamboo – like I said, always keeping it interesting.

Most of my attention has thus far been focused on the medical clinic that is being built in San Pablo, a neighboring lake village. So far, I have had the opportunity to help with drafting the plans and dimensions of the building using Rhinoceros, a CAD program that intimidated me at first, but I would now dare say I feel almost comfortable using. Almost. I also built a 3D model of the building, which has proven pretty helpful for showing to Vicente, the site supervisor, and JoAn, the director of the clinic, a better way of envisioning the space than with traditional floor plans. I have also been involved in design decisions, detail drawings of the Bambareque (a hybrid of bamboo and barajeque, two different building types) wall system, and site visits.

So far, it has been a whirlwind of an experience. Charlie and his team are definitely doing it. They’re actively out there, getting clients, stretching the limits of a sustainable building material’s applications, (they’ve made bamboo hammer trusses!!!), and doing it all while enjoying their lives. That’s one thing that has stuck with me the most. For all of the bouncing from one project to another, getting materials out to this off the beaten path location, juggling budgets, there is clearly a feeling of a life being lived and enjoyed here. That is what I so often find others and myself from the States compromising. We get so caught up in “making a difference”, and stretching ourselves so thin that the cracks start to show that we forget what we’re doing it for. We forget that in order to be players in creating a sustainable future, we need to live in a sustainable present. I can see that a lot of it stems from front-loaded preparedness, being smart and efficient and thorough in the beginning and not cutting corners. This really does pay off later in the game, and the stress levels seem to stay manageable. That is one lesson I will definitely take away from here. That and how to solder electrical wires together, power-wash an entire house, and harvest bananas.

A few months ago, I was fortunate enough to hear a lecture by Jeremy Rifkin, a writer, activist, and the founder and president of the Foundation on Economic Trends. At this lecture, Rifkin spoke of The Third Industrial Revolution: a long-term economic sustainability plan to address the triple challenge of the global economic crisis, energy security, and climate change. He described nourishing the “hubs “of sustainability that are cropping up all over the world (they’re there, and they’re getting stronger, I swear!), and then using our increasingly efficient methods of communication to connect these hubs and form a new way of living that is based off of symbiotic relationships in nature. Well, this little hub of bamboo builders is definitely worth connecting and sharing with. There’s energy here, a spark of the future we want, and it deserves to be put on the map.

Natural Building Internship

I’ve recently had the good fortune of being asked to build several new projects in and around the village where I live: San Marcos La Laguna, Guatemala, and also of meeting a talented carpenter and architect, Steve Selby.

The upshot of which is that I am able to offer an informal internship to people interested in getting hands-on natural building experience.

The internship would be a great way to learn natural building techniques on very original and experimental buildings, with some talented and experienced folk, in a very beautiful place, with a great community of both foreign and local residents. It also provides the opportunity to learn both Spanish and a very transferable trade at a time when natural building is booming, and in a place where building codes are thankfully still a long way off!

I’ll need to flesh out the description a little but in short I’d need someone who could offer their assistance five days a week, for six hours a day. Tasks would include site visits, supervision, documentation, drafting (both hand drawn and computers) and accounting.

You needn’t be a specialist or have a ton of experience but, to make it worthwhile for yourself and our team here, you’d need to be walking fit, independent, flexible, have basic computer skills, and of course be willing to get stuck in and learn whenever possible. Minimum commitment would be six months.

I may be able to offer some kind of accommodation later in the year, although currently our space is limited. A rustic one-bedroom house here rents for about $100 a month, although you can sometimes get free rent for house-sitting, especially during the rainy season (May-October).

If you’d like to know more, please send me a message!

Thanks, Charlie

Building with Cane – Arundo Donax

It’s not bamboo but looks like it.

It’s great stuff for cheap building – plane old cane embedded in mud, it can last up to 60 years.

Lots of folk around here (Guatemala) use it for cheap fencing but it rots fast, breeds woodworm and can look grim fast.

Much better in a bajareque earthen wall. For maximum hardiness, harvest only mature stalks on the full moon.

It’s not all good though – it grows so fast, burns when dry and the roots are fire resistant so it’s often responsible for spreading big fires and also for spreading like the wildfire resistant weed it is.

Arundo donax – Wikipedia, the free encyclopedia.

Bajareque Cabin Build – Part 3

Bajareque Walls and Earthen Plasters

Ventura, a local expert in traditional natural building, mounds up sifted dirt for the earth mortar, excavated directly from where we’re building. The rocks in the background will also help fill the walls.

An end-section of the wall. From left to right we have the door-frame, well oiled, a wooden spacer to separate the door-frame from the corner post, and the corner post, to which the lengths of bamboo (note that this bamboo isn’t hollow in its middle) have been strapped using both a local vine and some sisal string.

The wall goes up – with this method we placed about 50cm of rock and then flung the earth mortar at it using a trowel. The mortar contains sifted earth, pine needles and pumice sand.

Hands are the best weapon for flinging mud, and it works best with an opponent:
The higher up you go, the less you can fling as it shakes the whole structure – instead it works better to lay the mortar, place a rock in the mortar and then push more mortar to cover the rock and the bamboo.

The window frames – oiled cypress boards, to be filled later:

A trowel helps for the details:

This stuff is magic – pads of prickly pear cactus (known locally as nixte’en – nish-teh-unh – also tuna, or nopal), sliced and diced into 1″ cubes then fermented in water for one week:

After a week, strain out the scum and floating debris, and you’re left with an extraordinary transparent gel that works as an excellent binder and waterproofing agent for natural plasters. The gel lasts for up to a month before losing its strength.

But be careful not to lose it all – if you happen to slop even a little of it over the edge of the container, it’ll start pulling the rest of it with it and in seconds a giant transparent snake of goop will slide itself out onto the floor. It reminded me of the special effects in the movie “The Abyss”.

Applying the 1st coat of plaster:

We used local clay (25%), sifted horse poop (20%), 1/4″ white pumice sand (55%) and prickly pear juice. It smelt pretty foul at first but the odor soon disappeared.


On the outside we put a lime and prickly-pear juice render to prevent rain-splash damage near the base of the wall. The earthen plaster above it comes from recycled adobe bricks, which provide a near-perfect earthen plaster ready mix! We just added a bit of sifted horse poop (for the fibre) and some prickly-pear juice (for adhesion).

A stick insect enjoying the earthen tones:

Thanks for visiting, see my next post for more.



Bajareque Cabin Build – Part 2

The Roof

The rafters and ridge beam come from a local tree called tzajokché (pr. Tza-hock-chay), which needs chemical protection from bugs but is otherwise ideal due its long length, straightness and low density. It’s also local and quickly renewed if the harvest is well managed. Another popular tree for this is lema’, which is even lighter but more prone to insect attack.

Here’s the wall frame and most of the rafters up:

The roof stringers are the same material as the wall straps: Mexican weeping bamboo. However, we treated these ones in a solution of boric acid and borax to keep bugs and mould out. The bamboos in the wall don’t need any chemical protection because they’re encased in mud, which keeps out both insects and moisture – even killing what bugs might have gotten in during the build! I’ve seen 50-year-old houses demolished and the bamboos were as good as new.

So next comes the palm thatch from the coast, about 40 cents per leaf – this truck can carry about 2,500 of them:

And a human can carry about 25 of them! I consider myself tougher than most but I couldn’t carry more than 20. This guy, a 50-year-old father of six, carried more this day than any of the younger guys, many of whom carry building materials as their full-time job. I have utmost respect for their strength, stamina and resilience.

Next comes the thatching, a job best done in cloudy weather as it keeps the palm leaves fresher.

Each palm leaf is tied on using the outer edges of the leaf itself. A top thatcher can attach about 500 leaves a day with a couple of helpers to prep the leaves:

Looking out from under the eaves:

Lunch break – tortillas, chile, beans (yum!) and a 3-litre bottle of Guatemalan cola (yuck!):

And it’s done:

It’ll gradually turn grey over the next month, and it’ll weigh around half what it does at this point too – we had to put in extra bracing to help the rafters cope with the wet weight.

Next comes the walls – in part 3…