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Owned by Alex

Cob & Natural Building School

1.6k members • $10/month

Learn how to build your own natural, non-toxic house with cob and straw-clay. Save money, live debt-free, and be healthy!

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121 contributions to Cob & Natural Building School
Plaster recipe??
Hi, I built this outdoor shower with cinder blocks and stucco. I want to add cob walls around it. It has no covering. I am unsure if I should add portland or lime to the cob mix (or both) and what would be a good recipe or mix for plaster? Can hydrated type S lime work or does it have to be hydraulic? The climate is dry Northern Arizona. Thanks!
Plaster recipe??
0 likes • 2d
Awesome! Nice work. Looks a lot like my setup. I have a Camplux propane heater in mine. Even though you're in Arizona, I'd still add 10 to 15% Portland cement by weight of mixture. Mostly because of the water from the shower itself. You could substitute the Portland cement with Typse S lime. I would really go with Type S over NHL lime if you have the Type S available. You could maybe get away with using less than 10%, but I'd do some smaller tests yourself before building it.
Cob Quonset House - photos
Here are some photos from the "Cob Quonset House" that we completed a few years back. The home builder had put up a metal quonset hut structure, and they wanted the two end walls filled in with cob. Here's what it looks like!
Cob Quonset House - photos
1 like • 4d
@Jj Vee Well, I've never tried it, but I suppose it's worth a test. It would definitely swirl and smear though instead of coming out an even coloring.
2 likes • 4d
@Jj Vee One good way to color concrete after pouring is to do an acid stain. They look good.
Building Layout Tip! Batter Boards and Stringlines
I've just begun the layout for constructing my new timberframe kitchen. Watch to see how I do the layout. Please leave questions. I'd like to document this construction for you all here in the Skool group.
Building Layout Tip! Batter Boards and Stringlines
2 likes • 9d
It's a 120 sq ft overall footprint. It'll be my kitchen space with basic necessities. I've been cooking outside for the past 3+ years since I got my land.
3 likes • 8d
@N P - It'll be it's own standalone building. But very close outdoor walkable distance between everything. - I haven;t completely decided yet. It could be a mix between cob, hempcrete, and straw-clay. - Yes, it'll have sink with running water. I can definitely film that. - Yes, sure! - You can, but the walls will be as thick as the pallets. I prefer the larson trusses (reference the straw-clay lessons in the Classroom). - I have 3 cats. Leo, Lyra, and Luna. :)
Welcome! Start Here.
This is the Cob and Natural Building School. A community of people interesting in building natural, healthy homes. We teach everyone how to build their own cob home using traditional and modern techniques. Step 1: Comment Below! - Who you are - What your building goals are - What’s your biggest bottleneck right now? 😩 Step 2: Go through the Cob Building Basics Course! See START HERE - COB BUILDING BASICS
1 like • 18d
@Levi Brooks Very cool. If you don't have property yet, I have some good resources in here on finding the right land.
0 likes • 8d
@Vani Wadhwa Exciting! I hope you get a great piece of land. When I got mine piece, it completely changed my life for the better!
Tadelakt?
Anyone here really good at tadelakt? I just joined and wanted more info about that subject.
1 like • 17d
@Shawn Na I DM'ed you the actual video course link.
2 likes • 10d
@N P Kremer Pigments is also one of the best suppliers for non-toxic, natural pigments.
1-10 of 121
Alex Sumerall
6
548points to level up
@alex-sumerall-5026
Professional cob house builder and instructor at This Cob House. I teach people how to build their own natural earthen homes.

Active 19h ago
Joined Jan 30, 2025
Greeneville, Tennessee
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