Courses and Internships

3-Week Natural Building Internship in Sweden July 2017

July 1-21, 2017, in Garpenberg, Dalarna, Sweden

We are looking for short-term Natural Building Interns for JULY 2017! This is a free Natural Building Opportunity in Sweden, two hours north of Stockholm!

We are in the finishing phase of our natural house building project in Sweden and we have an opening for up to 3 volunteers for 1-3 weeks, starting on July 1 until July 21. We will be insulating the walls with straw. We will then plaster them both inside and outside, we will make our own clay mix using local soil, put siding on the outside and finish the floor of the roundwood loft in the inside. We would like you to come for at least a week and will be working around 5-6 hours per day to also have time to enjoy the area, go to the beach and relax! 

Basic food will be provided and we will cook communally in rotation. For accommodation please bring your own tent that you can set up in a beautiful area right by a lake. We have a tipi that can be used as a hangout space and a sauna to relax after work. To secure your spot, we ask for a contribution of 1000 SEK/ 100 €, no matter if you come for one or for all 3 weeks.

We are looking for people who are excited to learn about building with natural materials on a real project. Prior building experience its not necessary but you need to be willing to do physical labour. A certain affinity to nature and an interest in crafts will be necessary.

Please contact me for further information and to sign up!

3-Week Natural Building Course

Timber Framing, Clay Plastering, Natural Walls, Rocket Mass Heater

Terra Alta, Portugal, June 6-25, 2016!

Screen Shot 2016-01-19 at 6.23.59 PM

This is a unique opportunity to learn all the necessary skills to build your own natural home! In this 3-week course you will learn to build a reciprocal roof, how to make natural walls, how to make and apply clay plasters and paints and to top it off you will get the skills to build your own rocket mass heater!

Eva Wimmer and Joshua Lightfeet will return to Portugal this year and share their natural building skills! Contact Henrik at Terra Alta for details and to sign up!

For a detailed course description, visit the course page: Natural Building Course


Past Courses

Rocket Mass Heater Course in Sweden, June 13-15, 2014

at Tierra del Sol, Centro de Permacultura

at Tierra del Sol, Centro de Permacultura

Dates: June 13-15, 2014

Facilitators: Joshua Roxendal and Eva Wimmer

Course Fee: 275 or SEK 2500

Contact: joshua(a)

Web: Permakultur Stjärsund

After participating in one of these courses, you will have the confidence to build your own super-efficient Rocket Mass Heater. Furthermore you will gain extensive knowledge of natural materials and their properties, wood firing and design.

With the understanding of these  construction and wood burning principles, you will also be able to build other structures such as mud walls, benches, cooking stoves and more! We’ll also go over what it takes to build Rocket Stoves indoors and what other uses they have,for example in greenhouses to extend the growing season.

Course content:

* effective wood burning * sustainable systems and technologies, * earth building * rocket stoves and mass heaters * planning and design * natural materials and their properties * traditional construction methods * alternative energy

stjärnsundThe courses will be held at the “Permakultur  Stjärnsund” in Sweden. Permaculture Stjärnsund is a center of learning in the subject of permaculture in the resort Stjärnsund Southern Dalarna. Several projects are linked to the center, which work together to build demonstration- and research sites on permaculture and forest gardening. On their website you can find information about activities, events and other exciting things! There is also a movie that gives you a picture of Permaculture in Stjärnsund: http://stjä


Rocket Stove Workshops in Guatemala December 2013

RS-Workshop-FlyerAfter the successful course and teaching in Portugal, Josh and me will be spending the winter months in Central America! First Stop is San Marcos, Guatemala, where we’ll be facilitating two Rocket Stove Courses during which we will be building and designing an outdoor kitchen for The Yoga Forest! The dates for the courses are December 2-4 and 16-18. Please contact Hayley of The Yoga Forest for further details and registration!


Natural Building Course in Portugal, July 2013

with focus on Rocket Mass Heaters and Efficient Cooking Stoves: Advanced Permaculture Series – Natural Building and Appropriate Technology

Rocket Stove gutsDates: July 29 – 3, 2013. Location: Terra Alta, Almoçageme, Sintra, Portugal.

Facilitators: Josh Roxendal of Permaculture Ihop: and Eva Wimmer of Building Connections

Course Fee: €240. Past Treeyo students- 10% off ❤ fee includes camping accommodation and all meals that are organic, delicious, and homemade ❤

To register contact Melissa:


Permaculture Design Course (PDC) in Portugal, August 2013

August 5 – 18: 2-Week PDC at Terra Alta, Portugal. Take the journey of seeing with new eyes!

Praia da Ursa

Location: Terra Alta, Almoçageme, Sintra, Portugal

Facilitators: Doug Crouch, Pedro Valdiju, and Eva Wimmer with guest speakers

Language used: English (with help to translate unknown words whenever needed)

Course Fee:  € 550  (includes camping accommodation and all meals that are organic, delicious, and homemade)

Registration: Pedro at +0031 5937115275 or Melissa:

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