Anatomy of a Retaining WallThe basic parts of a mortared-stone wall. Components can vary for other wall types.
Keeps water from collecting behind the wall
Prevents soil from clogging drainage stone
The backward lean into the earth, about 1 inch for every 1 foot of wall height
Spaced every 6 to 8 feet, it lets water drain through the wall base
Reinforced concrete supports the wall
Carries away water
This Old House To Go