R Scott wrote:It will erode over time if not protected, BUT....
It is easy to patch and re-plaster and maintain. Most modern building materials need to be replaced. So it is cheap to maintain cob yourself, but it does take time.
R Scott wrote:good hat and boots--large roof overhangs and stone stemwalls and splash guards. Maybe a wattle fence to keep really strong prevailing winds from blowing rain sideways onto the house.
Bill Crim wrote:This is a random thought... Let's say you build a small house with cob walls. After it's dry, but before you put a roof on it, you light a huge bonfire inside of it. Would you get a solid brick house?
The rum I have been drinking tonight wants to know the answer.
A big lesson was learned at the famous St. Francis de Assisi Church in Ranchos de Taos when it was coated with cement stucco in 1967. This plaster cracked and allowed moisture to penetrate deeply into the adobes, but the relatively impermeable stucco prevented the adobes from drying out again. Large sections of the buttresses had to be rebuilt, so the community has now gone back to the annual renewal of the mud plaster - which not only keeps the church building in beautiful condition, but strengthens neighborhood ties as well.