Far from all natural, but inert and solid, Grancrete, http://www.grancrete.net/ ( or Ceramicrete if you can get it) is a thought. We are having the same discussion about roof coverings.
Tina in Colorado
I just love using natural products to build. My biggest challenge is coming up
with an all natural roofing material. I am expecting to build the roof
structure from paper but I am still searching and experimenting on the
outer roof layer. Fired clay tiles are an option but heavier than I would
like for my roof. Ideas anyone??
Wayne
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