There’s growing interest in living roofs or green roofs. The difficulty is deciding on the waterproof membrane. Rubber pond liner (EPDM) is the most waterproof and durable material, and the most common choice due to proven performance, but it’s also very expensive and made from nasty petro chemicals. I think a number of less toxic, … Read more
Our roundhouse is nearly finished and so I wanted to share some results. The main impression is one of incredible fortresslike strength — massive walls with no sway. Our roundhouse and dome are probably the two strongest buildings I’ve ever worked on. Our earthbag dome, for instance, never budged as about 15 truckloads of soil … Read more
I’ve just started a YouTube channel about earthbag building in hopes of seeing this building method spread more quickly, and to help improve the standard of construction. It’s easier for many people to learn by watching rather than just reading about it, and it’s a fun way to pass some time. Hope you enjoy it. … Read more
Using earthbags for interior walls would take up too much space and so they’re generally not recommended for this purpose. Thinner interior walls are more efficient. The easiest solution is to frame interior walls with 2x4s or, for plumbing walls, 2x6s. But there are more sustainable alternatives. On some of my plans I use adobe, … Read more
Do earthbags really become hard as rock or is this exaggeration? I did a little experiment on the roundhouse we’re currently building to find out. The answer depends primarily on the choice of fill material and the degree of compaction. The moisture content and curing process also play a role. We used road base – … Read more
One way to save money and reduce your impact on the environment is to use unmilled roundwood when building your home. Wood in the round is much stronger than standard dimension lumber and requires less processing. In our case it enables us to use local, sustainably grown wood instead of wood shipped hundreds of miles. … Read more