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Solar Adobe School - Learn about Adobe Construction, Adobe Home Building, Adobe Bricks, Green Building, Rammed Earth, Pressed Block Construction, Earthen Construction, Adobe Drafting.

Your Spring 2018 Drafting, Planning and Hands-on
at Bosque, New Mexico
Saturday/Sunday/Monday, May 26/27/28

Quick description: the class is slanted towards owner-builders or owner-coordinators. It is taught in a straightforward, descriptive style using drawings, PowerPoint, Hands-on, show-and-tell and lecture. Emphasis is on Code, Hands-on and Drafting for Adobe and Compressed Earth Block. The class takes place at a rustic site in the country, where classroom instruction alternates with Hands-on. Students work with authentic Adobe/Compressed Earth Block materials and tools. They learn standard earth mixes and cast adobes of different sizes. Larry Elkins* of Adobe International visits one day with his hydraulic press and students press earth blocks (called CEBS) using their own (and on-site) soil mixes. They learn stabilizer recipes and how to build walls, corners, arches, and door bucks. A 24” x 36”, 9-page set of plans for a small earthen home is included at no extra cost. Facilities are close by in Belén or Los Lunas (8 and17 miles by paved hwy.). Limited to 16 students. Valuable for gaining know-how to better qualify those you might hire.

Dust, insects, wind, mud and cacti may exist, but shade and cool drinks will also be on site each day. Gloves, protective footwear, hat, polarized dark glasses and light jacket advised. Students will be asked to sign a release once on site. Details and schedule below:

Practical Hands-on and method of teaching
Prepare to heft rustic materials as if you were on your own project. Specific goals are defined (such as building an arch). The class goes through arch instruction inside, then steps outside to build the arch. Photos are encouraged. Materials will be ready, such as window bucks, forms, adobes, pressed block, mud mixes, plasters, stabilizers and various tools. Students will study soil materials, blending materials and forms for adobes/pressed earth block. Wall constructions will be to code. On site learning includes traditional adobe making, pressed earth block, stacking, cutting and laying, electrical circuits and boxes, setting up rough bucks, bond beam construction, turning corners, proper overlaps, in-wall reinforcement, wall finishing for exposed work and wall prep for plaster or stucco coverings.

Using the Bobcat bucket as a measuring spoon for Adobe materials. This bucket holds 8.3 cubic feet when leveled off across the bucket top.For example, we will teach you inside about laying adobe or CEB* walls to code, then go outside and lay some adobe and CEB walls to code. Likewise, we can teach you the procedure for stabilizing adobe or CEB in the classroom, then step outside to mix up that recipe and cast or press some block from it. We will show you a wall construction on the drafted sheet, then turn around and show you a built example on site.

Being in the country means avoiding the hassles of big city traffic in Albuquerque. Belén, a small town with motels/restaurants, is 8 miles north. At the country site, our only noise pollution is the occasional Santa Fe train passing by. We will supply coffee, cold water, juice, shade, chairs and Portapotty. Local directions, maps and facilities info sent when you register. Call 505-861-2287 or email us at if you have a special situation. Over sized or extra long vehicles may have to be parked off site.


Class Content and Schedules

Description, Schedule and Registration
Saturday Morning, May 26

8:00am - 8:20am Coffee and site safety tour. Grab a cup and walk around our immediate teaching area for a quick tour showing you the work stations and pointing out site hazards.

8:20am - 12:30pm lunch Soils and Adobe/CEB Manufacture for the small builder to include Site Prep., Learning about soils and Making Blocks. We’ll be outside for approximately 2 hours with 2 hours inside. Break as you need to. SWSA will have mud mortar ready for Adobe, as well as a drier soil mix for Compressed Earth Block. Assorted “dry” piles of clay, sand and small aggregates will be on hand for blending or amending a mix. You are encouraged to bring some of your own soil if you are driving to class (we’ll test it with a hydraulic press or use it to cast regular adobes). Class will also make small 7” x 2” x 10” adobes used in hornos, domes and vaults. Forms will be ready to make standard and larger adobes, such as the square “corner adobe” (14” x 4” x 14”) and a historical size used for 32” wide walls in Santa Fe in the 1700’s- the 20” x 4” x 10” adobe block. We’ll show you how to make “special” sizes that you might need on your job.

Check-off list of what we’ll do

  1. Explain about “site prep” to set up your home site for Adobe or CEB and clearances for different adobe materials or services.
  2. Show how to lay out your Foundations/Stems/Floors to code.
  3. Determine what a suitable soil mix is for Adobe & Compressed Earth Block and soil types to avoid.
  4. Look at different screens to prepare rough soils for block making or mortar.
  5. Learn how to figure how many cubic yards of material you will need to make the adobes or CEBs and mortar for your home- the 40% rule.
  6. Understand different methods of forming and casting Adobes.
  7. Learn about “inserts” that can change adobe/CEB shapes for different uses, such as channels for electrical circuits or in-wall reinforcements.
  8. Learn about tools that cut or shape Adobe or CEB in the field. How to cast holes in Adobes during manufacture.
  9. Rudimentary field tests for compression and modulus of rupture for adobe and CEB. Some codes will require a lab report with your plans, showing your block p.s.i. and modulus of rupture. Knowing the field tests can enable you to meet code without too many lab visits (at $75 per test!).

12:30pm - 1:45pm lunch break - brown bag on site or drive to Belén (10 min. drive).

Saturday afternoon, May 26

Jakob López prepares 1" x 8" boards to make up Bond Beam forming.1:45pm - 5:00pm Laying Adobe or CEB to build a wall and learning to make an adobe or CEB arch. Also, Setting Leads, loading the course and tying into a rough buck. The idea this afternoon is to get you into mixing the mortar you’ve learned about, and laying adobes to the string. At the same time, learn to turn corners, build an arch and finish the wall around the arch.

Check-off list of what we’ll do:

  1. Going over Speed Leads and how they are made and work.
  2. Setting and plumbing the leads at the stem corners and stretching the string and line blocks. Setting level courses.
  3. Understanding your bed joint options before deciding on your course marks (outside). Electrical circuits and/or in-wall reinforcement may play a role, as may the difference twixt CEB and standard adobe.
  4. How to lay mortar on the course using the shovel.
  5. Understanding code overlap requirements.
  6. Placing Adobes or CEBS on the course.
  7. Setting dur-o-wal® reinforcement in a course (wall ductility & seismic resistance)
  8. Ways to tie door/window rough bucks to walls. Demo of two popular methods.

Various tools specific to Adobe and CEB. Try them out at class.Building an Arch and pulling the form right away
Types of arches explained and their uses. Arches can save you money and add appeal. Also, If you want to learn to build a vault or dome, the novice starts by learning to build arches.

Check-off list of what we’ll do:

  1. Setting up our arch form on a length of wall.
  2. Use of wedges, centering stick and other tools.
  3. Building the Roman arch - instructor starts a 36” diameter arch (radius of 18”). Class quickly sees ‘how to’ and will finish the arch. We will pull the form right away to demonstrate how the arch locks upon itself. Learn how to remove the form.
  4. Class lays more courses of adobe around the arch, which requires trimming blocks to fit and learning to tool the head and bed joints for appearance.

5:00pm Site clean up - day’s end.


Sunday Morning May 27

8:00am - 1:00pm Your home Floor Plan and designing for savings. Using adobe’s mass to your benefit. Regardless of where you’ll build, the old axiom, “Sun and Adobe work together” comes into play. Most have a preferred “style” in mind- such as Santa Fe or Pueblo, Mission Revival, Territorial or Contemporary. Which is the best choice to carry out your ideas? Which is cheaper to build? What kind of wall finish or floor would be most economical or easiest to clean? Which is best for passive solar energy?

Check-off list of what we’ll do:

  1. The main 3 passive solar techniques and where to deploy them. How to determine true south (please, no topo maps) and figure your sun angles. Raul Ortega’s presentation of sun angles using Sketch-up software can help you see where the sun will hit different walls at any time of day or year- just know your latitude and longitude.
  2. Where rooms can go for best comfort and effectiveness for energy savings in a solar home.
  3. Pros and Cons of the various architectural styles & wall finishes for Adobe and CEB.
  4. Figuring the amount of south glazing you will need in your climate zone.
  5. What the code says about minimum insulation levels for walls, ceilings and perimeters in your climate zone. Wall systems choices, such as single, double or double with insulated space.

1:00pm - 2:15pm lunch break - brown bag on site or drive to Belén (10 min. drive).

Sunday Afternoon May 27

2:15pm - 5:30pm Looking at the area of stems, baseboards, floors and convenience outlets. Gain some insight into how electrical systems are set up in Adobe and CEB. Go outside and set up some electrical circuits on an adobe wall section. We will use our bond beam on site as an example and show you how to form up a bond beam.

Check-off list of what we'll do:

  1. Fireplace mason Jim Buckley has raised this Rumford up to the smoke chamber level during an SWSA class at Edgewood, NM. Buckley was instrumental in getting Rumford fireplaces into the IRC/IBC codes. Figure required stem heights, finish floor levels, door thresholds, ramps and railings.
    Explain Floor choices, such as brick on sand, tile or Saltillo tile on slab, flagstone on sand, etched slab and adobe floors. Explain Underfloor radiant systems and Radon prevention. Explain Code requirements for stems and your stem finishing choices. Drawings, slides, show and tell.
  2. Set up a few electrical circuits and boxes on one of our adobe walls. Set up pipe (such as Carlon sch. 40), UF cable and show how to set and position a box. Differences between CEB and adobe bed joints require knowing how the wall will be finished (plastered or exposed), thickness of bed joint and whether blocks are channeled. Learn which things not to run together in the same course.
  3. Go over bond beam options- what code says. Check out a typical bond beam setup with steel requirement in place. It will be ready to photograph.

5:00pm : Site clean up- day’s end.

A custom adobe (2017)  under construction by Albuquerque contractor Winn Delapp.

Monday Morning May 28 (Memorial Day)

8:00am - 10:30am Stabilization of adobe and CEB. Go over recipes for preparing Portland based and emulsion based stabilizers. Do’s and don’ts. Mix up stabilized batches and cast or press block.

10:30am - 12:30pm Check out hydraulic press from Adobe International, visiting class with operator Larry Elkins.*

Check-off list of what we’ll do:

  1. Mix up a wheelbarrow of emulsion-based stabilized soil and cast some adobes from it. Show difference in texture and moisture content of stabilized mud mortar from that used to make blocks.
  2. Set up a wheelbarrow of Portland-based stabilized soil and cast some adobes from it using hand forms. Also press some adobes from it using the Cinva Ram.
  3. Students bringing their own soil can press, amend and press again different soil types, using the Adobe International hydraulic machine towards a better mix. Great chance to talk to one of the regional manufacturers about how these machines work.

12:30pm - 1:45pm lunch break. (brown bag on site or drive to Belén- 10 min. drive).

Monday afternoon May 28

1:45pm - 5:00pm Review of Fireplaces, wall types, roof types, attachments and energy codes

Check-off list of what we'll do:

  1. Explain what code requirements are for efficient fireplaces. Not understanding them leads many to abandon their hopes for a real fireplace. Even in the low desert, everyone likes a fireplace and they increase sales appeal (we are willing to start a fire in our Rumford on site). Understand the anatomy.
  2. Review all earthen wall types. (single, double, double with air space, double with insulated space). Drafting tips on presenting your chosen wall system to the Plans Examiner at permitting time.
  3. Review of attachments between foundations, wall and roof.
  4. Understand a historic adobe roof vs. two popular contemporary ones. Handouts of roof cross sections. Talk about parapets, gable ends and hip roofs and their respective costs and seismic resistance. If you are fixated by a certain roof type, how will it fit your climate and pocket book?
  5. Explain IEEC and NM energy code requirements- (it's like doing your taxes, but somewhat more interesting).

5:00pm Clean-up and end of class. Students load their test blocks into vehicles before departing (bring a few sheets of cardboard for cushions- your blocks will still be green). At least one instructor will stay on site until 6 pm to answer lingering questions.

Cost: $339 single or $475 for two registering together.
Class capacity: 16 students.
Included materials: Earthbuilders Encyclopedia CD, 98 page handout collection, 9 page plan set for a small adobe/CEB home and 40+ page notes to accompany the plan set. Most handouts 3-hole punched.

*Larry Elkins may come on Sunday, rather than Monday, in which case, day schedules will switch on those 2 days.

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