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After the sand was shaped, wet newspaper was put over the form. This would serve as a barrier between the sand form and the first layer of the oven, showing exactly where the sand form stops and the first oven layer starts. The newspaper also helps the sand form keep it's smooth shape if it's not going to be worked with for a while. | After the sand was shaped, wet newspaper was put over the form. This would serve as a barrier between the sand form and the first layer of the oven, showing exactly where the sand form stops and the first oven layer starts. The newspaper also helps the sand form keep it's smooth shape if it's not going to be worked with for a while. | ||
== Thermal Layer == | |||
The next step is to add the dense thermal layer to the sand form you have created. This part is normally 1 part clay, 2 parts concrete or sharp sand, and water. This mixture is created by folding it all together in a tarp and stomping it into a good mix. This layer should be sturdy enough to make a strong outer layer and should be about 4 inches thick. Start at the base and push downwards. Then, work your way up slowly to form this layer. | The next step is to add the dense thermal layer to the sand form you have created. This part is normally 1 part clay, 2 parts concrete or sharp sand, and water. This mixture is created by folding it all together in a tarp and stomping it into a good mix. This layer should be sturdy enough to make a strong outer layer and should be about 4 inches thick. Start at the base and push downwards. Then, work your way up slowly to form this layer. |