Chris Maynard and team prepare for two intense helicopter deliveries of roof rafters, and Greg precariously scales a raised rake wall to nail it into place. John and Heather are finishing the roof by installing insulation and metal sheeting when the forklift won't shift gears and threatens to knock over their timber frame. Josh and his team work from jagged pallets and rickety ladders late into the night to finish the three gable walls for Keith and Kathleen's cabin.