The guys head to Canaan Valley, West Virginia for the largest commercial project they've ever built. Working with massive timbers, they make an intricate post and beam structure. And Mark meets the team who will make this place a wellness center and spa.

Using a mix of old school techniques and modern day tools, Mark and the guys bring every log back to life in an 1800s log cabin. Along the way, Sherman visits a log home addition in Virginia and Katherine checks in on the progress at Barnwood Village.