The Barnwood Builders return to Canaan Valley, WV to finish the biggest commercial structure they've ever built -- a two-story, post and beam wellness center with heavy duty steel brackets and intricate scissor trusses inspired by a local church.

The Barnwood Builders travel to New Salem, Tennessee to save a rare 19th century "saddlebag" style cabin before it's too late, battling the elements to preserve every last timber. Mark tours a home built from container cabins and gets a sourdough lesson.