The first thermal layer was 2 inches think, and we used what we thought was pure clay. We later discovered that it had a high silt content and most of it broke away from the outer layers of the oven when we fired it. This was very discouraging. Kiko Denzer was kind enough to give us advice via email on relining the oven with a purer clay after it was built and this has held up well. It is definitely worth the time to test your clay and the clay-sand mixes as Kiko explains in his book.
Please contact Tim or Susan if you have questions about our outdoor kitchen. We would appreciate any feedback regarding this website.
