Cleft Chestnut is as traditional as you can get. Cleft Chestnut Rail or Chestnut Pale Fencing.
Cleft Chestnut Rail fencing can be supplied in many different ways. Either 1, 2 or 3 rail using a treated softwood, oak or cleft chestnut post. Double mortices are the most common but you can use 1 large central mortice. It is up to you. Some images below to give you some ideas.
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