Diy Wood Retaining Wall Construction . Wood can potentially be free, if you’re using timber from your own land. Start at one end of the wall and install one block at a time, leveling side to side and front to back with a torpedo level. sleepers retaining wall Google Search Garden retaining wall from www.pinterest.fr Stake out the perimeter of the wall. In this video we will show you how to build a retaining wall! Nail the header onto the bottom of the vertical.