As we all know, it’s been a rocky year (uhhh, at best). However, I want to take this opportunity to share some updates about workshops and natural building happenings. I also want to take a moment and find something positive to celebrate about the past year. I hope you can do the same.
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Our Natural Building Essentials Workshop has come to an end. What a fabulous four days. The focus of our efforts included light clay straw knee walls, clay plaster over wood lath, and an earthen floor in the timber frame “Hammock House”. Students also had a chance to make a cob oven, and experiment with finish clay plaster and clay paint. Click ahead to see more photos.
A couple of weeks ago, we hosted our first Natural Building Essentials Workshop of the summer. What fun! The weather held out and we had great camping conditions, and April cooked up a veritable feast for our intrepid mudslingers. I think it’s fair to say everyone had a great time, myself included. Check out some photos of the course below!
Clay plaster base coat application in process
Clay soil is one of the most ancient, rudimentary, yet effective building materials on the planet. Besides being naturally abundant across much of the earth, clay has unique properties that make it not only suitable but very desirable as a natural building material. Clay is used for the production of fired brick, sun-baked adobes, cob, and natural plaster finishes.
In this very basic introduction to clay soil, I will highlight some of the unique water-loving features and other useful attributes of clay when it’s used as a natural building material, particularly as a plaster finish.
A student floats a creamy layer of clay plaster during one of our workshops
In my recent series of posts, I’ve described the process for building and finishing a light clay straw wall. First there was mixing the light clay straw itself and stuffing it into wall cavities. Then I discussed how to prepare for plaster by making and installing wood trim, and coating the walls with a simple clay slip. Next I’ll describe how to make and apply a base coat (or scratch coat) clay plaster. Now it’s really getting fun.
Smearing clay slip on a light clay straw wall prior to plastering
Clay slip is an essential material for coating straw bale and light clay straw walls prior to plastering. Basically, it serves as an adhesion coat, essential for getting the first coat of plaster to stick to the wall. There’s not much science to making clay slip, and it’s really fun to smear. Here are a few really simple tips for making and using clay slip for natural walls.
Light clay straw walls are a great surface for finishing using natural plasters. Because the straw-clay is tamped inside of a stud wall, you have a fairly flat surface to start with, compared to something like straw bale which needs a lot of trimming and often extra thick plaster to achieve an even surface.
Here I’ll give some tips and suggestions for how to prepare a light clay straw wall to receive clay plaster, using our recent outhouse project as our demonstration site. In this post, I’ll talk about how to make and install wood trim, which should be the first step in preparing your newly built wall to receive clay plaster.
There are a few tricks you’ll need to ensure a quality job. Read ahead for my method…
Making chopped straw with a standard lawnmower
Chopped straw is an invaluable ingredient for clay plasters and earthen floors. Unfortunately, it’s a bit of a drag to actually make the stuff if you don’t have the right tools or equipment. If you’re building a straw bale wall, you get the benefit of collecting the chopped straw once you shave your walls (which is commonly done with a weed whacker). But if you’re working on a different type of structure, you’ll have to find a way to specifically make the chopped straw.
The ol’ “weed whacker in a barrel” gets really old really quickly, and frankly isn’t that effective. If you don’t have a leaf mulcher or wood chipper, which are far more efficient, you can actually use a lawn mower with a bag attachment to chop all of your straw for plaster. Here’s how to do it.
It’s been quite the eventful September. The big news of the month is that we hosted our first Natural Building Workshop at the homestead. It was, in a word, wonderful. We had a very diverse group of 10 folks come out to learn all about cob, light clay straw, clay plaster, and clay paint. I couldn’t have asked for a better group. I’m continually amazed at the positive energy that is generated through these workshop experiences.
One of our projects was building the light clay straw walls of our new outhouse, which I’d like to document a bit here. This is an outhouse that will serve future workshops and large events (as well as being quite useful for just ourselves, too). The building is also a little bit of a “natural building showcase”, as it will have a few different types of natural finishes on display when all is said and done.
Read ahead to learn about how to build a light clay straw wall.
Putting roof decking on the new outhouse
Our first official natural building project on the land this year is an outhouse. Ha! I kinda love that. Right now we’re in the midst of framing a small two stall outhouse that will be one of the site projects for work & learning during our upcoming Natural Building Essentials workshop. This outhouse is going to get a pretty special treatment in the form of light clay straw walls and a clay plaster finish. The finished product should be pretty de-luxe.
Hi there, I’m Ziggy. In 2008, I launched The Year of Mud while building my first natural home. This blog is a collection of personal stories and experiences building with clay, straw, and wood over the past 15+ years. A few of the things that get me fired up are natural plasters, timber framing, & Japanese architecture. Since 2012, we’ve been hosting Natural Building Workshops so you can learn essential skills to build your own natural home.
