How to build a retaining wall: Step by Step By David Gordon – Baywide Dingos Napier, Hawkes Bay, NZ   These projects usually have a generic way to do them but each job is different with different levels and slopes, steps & tricks. Here are a few guide lines and general steps to learn before starting: Excavate the wall line with a machine. Make sure you leave enough room usually 200-300mm from the wall position to the excavated bank so that you can nail the boards on to the posts. Run a string line along the bottom from either end and make sure you have an equal level all the … Continue reading How To Build A Retaining Wall