Selecting Soil for Cob and Testing Your Cob Mix

A good cob building soil has approximately 15-25% clay content and less than 30% silt. There are many kinds of suitable soil types: clay, sandy clay, sandy clay loam, clay loam, and loam. There can be a lot of complexity and things to think about with finding a good...

Selecting The Best Building Site for Your Cob House

Analyzing site selection is a critical first step in building any type of home. It should arguably be done before any building design, layout, or construction takes place because it can have a large influence on the home design itself.  One great advantage that...

The Best Introduction to Cob Houses and Cob Building

What is a Cob House? Cob is a building material made out of clay-rich soil, aggregate, fiber, and water that is pliable and can be constructed into walls for buildings. Many people are familiar with a similar building material called adobe, which has many...

How To Install A Second Floor In A Cob House

In this video, I’ll show you how an intermediate floor is integrated into a cob house that is more than one story tall. There are many ways to do this, but I’m going to show you a really beefed up way to install one so…...

Is Mold A Problem In Cob Homes?

A lot of people have a fear about mold growing on cob walls. There is a misconception going around that cob attracts mold. This is actually not the case. We also need to step back and make a comparison between a cob wall and…...

How To Install Windows And Doors Into Cob Walls

When first learning how to build a cob structure, it can be a mystery about how all those doors and windows get installed into the cob walls. Its actually not too difficult! For example, as you build the walls upward, layer by layer, you come…...

Cob House Thermal Mass and Insulation

In this lesson, we’re going to revisit the topic of thermal mass and insulation. This subject can be a little bit complicated, but I’m going to try to break it down for you into simple concepts that you can apply. So, if cob does not…...