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13 contributions to Cob & Natural Building School
How to Transform a Conventional Home into a Natural, Non-Toxic Home
Want to do a natural building renovation to an existing conventional home? Here's how I would go about doing it. It's not as complicated as it might seem!
How to Transform a Conventional Home into a Natural, Non-Toxic Home
0 likes • 10h
@Alex Sumerall What design software do you use? I think I need to get one.
Slip straw insulation
I've started a project! I'm still looking for suitable and affordable land for my cob home so in the meantime I'm getting familiar with some natural building materials. I live in an old house, built around 1890 with multiple additions. My west wall isn't well insulated and my kitchen pipes freeze every winter (I'm in central IL,USA). My plan is to tear out the entire kitchen wall, pack the space between studs with slip-straw, and finish with an earthen plaster. I'm starting with a small section as a learning lab. Yesterday was demo which I finished today, and started my first foray into slip-straw. Lessons on day 1: I definitely need to round the handle of my pounder. Even though I sanded the edges and corners, my hands are still feeling it. Slip-straw has a bounciness I didn't expect. I hope I compacted it enough. We'll see tomorrow. I'm starting to understand slow, yet immensely enjoyable building. Heart and soul are ingredients you don't see on any materials list. I have read differing opinions on how quickly you can remove the forms. Some say let it dry at least overnight, some say you can remove it right away and keep building the next level. I wonder when you keep working right away if the base put. Anyone have experience in that?
Slip straw insulation
1 like • 10d
@Karen Glass I just finished the slip straw yesterday! After I tore down the many layers of old drywall, paneling, plaster and lathe I had a 1 1/2" difference in the depth of the wall! I had to build it out and I'll add plaster to the other side to make it flush. I also found out that when the old chimney came out (previous owner), they didn't patch the hole with sheathing on the outside. It was just sided over with a wisp of fiberglass insulation separating me from IL winters. No wonder my pipes froze! Overall, the project has been going well. It's very forgiving and once you get a feel for it, it's kind of meditative. If you're interested in it, pick a small section and just dive in. To finish, I'm going to drywall over the part of the wall that sits behind the lower cabinets since no one will see it and it'll be so much faster. I really need my kitchen sink back! I've always wanted to learn to install tile so I'm going to make a tile backsplash that will be applied to cement backer board. Then I'll plaster the rest up to the ceiling. One thing I've noticed since having the insulation done (besides the lack of breeze) is how quiet it is. The difference in quality of the environment is amazing. Or maybe it's just bc I did it and I'm proud of it. 😁
0 likes • 5d
@Alex Sumerall Thank you! The plaster took a little bit of experimentation but I got it after a couple batches. I came to the conclusion that the best consistency is cow splat. 😂 If you drop it from waist height it should splat on the ground without splashing. Very technical, I know! I found I need more water and less straw then I originally anticipated. I used a 1:3 ratio of sand: soil and had a little cracking. I'll increase my sand for the next coat to 1:2 and finish with a 1:1 (no straw). I roasted dinner tonight and had to open a window it was so warm! Amazing!
Building Foundations for Natural Buildings
Let's start a discussion about foundations for your natural buildings. Constructing the foundations is very important, and it's one of the things I'm most passionate about when it comes to building structures. Please leave your questions here and let's talk about this critical component of building.
Building Foundations for Natural Buildings
1 like • 12d
@Alex Sumerall I'm interested to get more information on the different types of insulation options for the stem wall. For those of us in cold climates, in order to get the most benefit from a passive solar design it's important that we don't lose heat through the uninsulative concrete. I've heard of people using a vermiculite rich insulative concrete mix to fill the interior of the stem wall, expanded clay balls (hydroton), and pure vermiculite. My question revolves around weight bearing issues. How do I add insulation without compromising structural integrity?
I feel gutted
We had a heavy rain storm come through and wash so much of our cob away. I feel defeated 💔💔
I feel gutted
1 like • Aug 29
Hang in there! Every project has setbacks. They're never fun, but you'll get through it. Think about 5 years from now when you're enjoying your beautiful home, looking back and laughing about this moment that becomes a forever story. You're doing great.
Slip straw forms
Hey all! I'm getting ready to start breaking ground for a sauna and was thinking about experimenting with a hybrid. I'd like to make the stem wall from stone and make the north wall slip straw and the rest cob. My question is: when setting up the slip straw forms, how do they attach to the stem wall or do they attach? Thanks for any info!
1-10 of 13
Becca Roberts
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28 points to level up
@becca-roberts-8894
Howdy!

Active 10h ago
Joined Feb 4, 2025
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