Ray, I think you are confounding "rammed earth" or "Leichtlehlm" which is a "light clay" with cob. Can you give us the reference that you saw? Darel Ray Luechtefeld wrote: > >..... I saw a reference to historical cob buildings that mentioned that > some of the "newer" (150 years old) cob houses were built with forms to hold > the cob in place. > > Ray