What goes behind a retaining wall matters just as much as the blocks you can see, and choosing the wrong material could undermine drainage and stability.

Retaining walls help to fortify sloped backyards (and front or side yards) against soil erosion and make it easier to add landscaping ranging from green grass to plants, wildflowers, rock gardens, ...

With retaining walls, one big consideration is hydrostatic pressure. If water is allowed to collect behind a wall, the weight ...