I have begun planning mine and my S/O's future home and have been exploring various building techniques, etc. Which we could use. We are both particularly drawn to the soft, organic appearance of cob, though our future home is going to be "hobbit hole" in nature, for lack of a better description. That is to say, we intend to have the roof and walls covered in a growing medium and grass.
Due to this, cob obviously is not the best choice, especially living in a rainy location (PNW).
We are considering mixing two methods in order to retain structural integrity, protect the cob from water, and keep the aesthetic we are seeking. These two methods would be cob and earth bags.
Based off of the anatomy of a green roof, would it be reasonable to assume we could use layers ordered as such to protect the home?
Grass and growing medium - filter fabric - drainage layer - water resistant membrane - Earth Bag - thin insulation - vapor barrier - cob
Provided I'm looking at this correctly, layering this way would protect the cob from moisture, right? Or is this simply not possible?
All suggestions welcome, warnings also welcome.
