layer 3

The outer crust was made from 6 bags of 12.5kg terracotta + 6 x 25kg bags of sharp sand. This layer also covers the chimney surround.

You will need some kind of flu pipe. I used an 8 inch internal diameter insulated stainless flu pipe obtained on ebay. Ours is 1m long. I wouldn’t be tempted to buy anything shorter. We do get smoke leaking out of the front until the oven gets hot.

The pipe needs to be the twin-walled type if going through a wooden roof or you will soon burn down the shelter.

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