Making Cast Stone Earthbags with Sodium Carbonate

I consider yesterday’s blog post about making cast stone earthbags one of the most exciting developments in earthbag building. This newer, simpler geopolymer process sure seems like it will become popular. It sounds like a million dollar idea to me. I imagine millions of people would love to live in an all natural, affordable stone … Read more

Earthbag Building May be Thousands of Years Old

Major Breaking News. Tim, one of our readers, sent me some information the other day that explained how Bill McNulty has patented the process of making cast stone using natron salt (sodium carbonate) mixed with powdered granite, limestone, basalt, schist or sandstone mixed with water. This is a slightly different method than proposed by Professor … Read more

Integrating Shelter, Food, Water and Sense of Place

The $300 House design competition has about 300 affordable housing projects to study and learn from. I found Kevin Songer’s Integrated Shelter project, and even though it’s borderline genius, it’s way down the list. He entered the contest shortly before the deadline and so most people haven’t seen it. Quick summary and then I’ll let … Read more

Lightweight, Insulating Geopolymer Earthbags Part 1

We’ve been discussing Professor Joseph Davidovits cast stone research at the Geopolymer Institute in hopes of applying this concept to earthbag building. You have to admit the possibility of building a house with dirt cheap, natural materials that turn to actual stone and become fireproof, insect proof, bulletproof, etc. is intriguing. [Update: two people have … Read more

Very Good Earthbag Walls

There’s a wide range of earthbag building systems and some are obviously better than others. Let’s summarize the leading V.G.E.W. contenders. Links are included to make it easier to research the details. – Eternally Solar’s earthbag walls filled with sand. Engineering tests show they exceed building code requirements – Eternally Solar’s earthbags can be filled … Read more

Earthen Acres: Moving In!

Danielle Acres is finishing up her cob house and moving in. I highly recommend taking a look at her blog. It’s totally packed with quality color photos and building ideas. Plus, she’s a real sweetie. (I can say that and not get slapped around because I’m old enough to be her great granddad.) One of … Read more