A lot of farms used old or re-cycled timber. In Devon near Totnes it was the custom to take green timber down to the river to season and buy wood from the ships brocken up. Trouble was a lot of it was so salt soacked the animals chewed it. Donkeys years ago we took down an old wattle and daub barn on the edge of Dartmoor. The timber roof beams were reclaimed for a restoration project. It was as solid as stone, took diamond tools to cut. The wattle and daub was fine until you cracked the outer plaster, then a few days of rain, and it just dissolved. My family is Monmouth based, near Abertillery, my Mother always said there was England Scotland Wales, and Monmouth.