After you have worked out the measurements for the oven. You need to form a sand mold for the oven void. On the workshop we made an oven that was 22.5" in diameter and the height to underside of roof was 16". We set out the full circle with a marker attached to a string and a nail as the center point. The height was set up with a stick cut to the appropriate height.
The sand mold has to stay inside the circle. work the sand into a half sphere, using the stick as a guide for the height. Don't add too much sand at once as it will be difficult to manage. Do not rush this part.
Make sure that you make the sand smooth as this will allow for a smooth finish on the inside of the oven when you remove the sand (in stage 6).
Use a piece of timber and wedges to hold the sand in at the door ope.
The sand mold should look like this after it is finished
Use wet newspaper to prevent the sand sticking to the oven mud in the next stage.
The sand mold fully covered with wet newspapers ready for the next stage.
Make sure that you make the sand smooth as this will allow for a smooth finish on the inside of the oven when you remove the sand (in stage 6).
Use a piece of timber and wedges to hold the sand in at the door ope.
The sand mold should look like this after it is finished
Use wet newspaper to prevent the sand sticking to the oven mud in the next stage.
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