Home      About      Contact      Submit an Item      
Passive    PV    Homes    Commercial    Wind    Projects    DIY    Resources    Tools    Materials    
Watch francis kere architect thumbnail

Francis Kere Architect Video

Watch Great River Energy LEED Platinum Thumbnail

Great River Energy LEED Mechanical Systems Video

Watch Floating Wind Turbine Pilot Thumbnail

Floating Wind Turbine Pilot Video





Green Architecture & Building Products

Please submit products and materials for this section by using the "submit an item" link at top right of page.

For engineers, materials scientists, architects and inventors who need detailed information on the properties of materials, please visit MatWeb, a searchable database of material properties with more than 93,000 entries.

Material or Product



Cob is an old method of building with earth and straw or other fibers. It is similar to adobe in that the basic mix of clay and sand is the same, but it usually has a higher percentage of long straw fibers mixed in. Instead of creating uniform blocks for building, cob is normally applied by hand in large gobs (or cobs) which can be tossed from one person to another during the building process. The traditional way of mixing the clay/sand/straw is with the bare feet, and is labor intensive. Some of the process can be mechanized by using a backhoe to do the mixing. Because of the straw, cob can be slightly more insulating than adobe, but does not make a comfortable house in a climate of extreme temperatures. Cob was a common building material in England in the nineteenth century, with many buildings still standing.


Cob Wall

Cob wall construction, using clay, sand, straw, water and earth.