[Cob] EU regulations for building with clay and earth

[Mark Piepkorn]

It's in German, and it's not free, but there it is.

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http://www.earthbuilding.info/standards/

To improve and ease the appropriate and correct use of clay and earth 
as a building material and to ensure the ecological quality of this 
building material is respected the Dachverband Lehm e.V. published 
the "Lehmbau Regeln" in 1999, the first technical building 
regulations for building with clay and earth in the European Union. 
For the first time since 1971, when then previous relevant DIN 
regulations were withdrawn, regulations detailing concrete 
construction guidelines for building with earth now exist. The 
Fachkommission Baunormung, the expert panel of the cooperative 
ARGEBAU, has included the "Lehmbau Regeln" in the list of recognised 
model technical building regulations.