Retaining Wall Gravel Backfill

Rcp recommends using 3 4 crushed gravel.
Retaining wall gravel backfill. Design and build your retaining wall to slope at a minimum rate of. Using construction adhesive secure your block caps and create the top layer of your retaining wall. Preparing a troublesome site one that includes clay soil or a natural spring for example can raise costs substantially. The process of making sure that a retaining wall drains properly is relatively simple but it is not very flexible.
Cover the gravel between your retaining wall and landscape with topsoil or sod so your garden will grow against your wall achieving a natural look. Crucial for supporting the rest of the wall a good base is made of compacted soil and at least a six inch layer of compacted sand and gravel. During the installing it s critical to ensure that the retaining wall base is compacted and level so that the first course of retaining wall block will be level. The block caps should overhang the retaining blocks by 1 to 1 1 2 inches.
The retaining wall should have 12 of gravel immediately behind the entire length and height of the wall to allow for proper drainage. The wall gets its. Retaining wall landscaping cost. If you have your retaining wall built figure about 15 per square face foot for a timber wall 20 for an interlocking block system or poured concrete and 25 for a natural stone wall.
Adding proper backfill to your retaining wall is extremely important as this is a key element in helping divert water away from the back of the wall eliminating hydrostatic pressure the leading cause of retaining wall failure. Second a retaining wall must have properly compacted backfill. How to set up your retaining wall to drain properly. Although there are exceptions most retaining walls require gravel backfill soil compaction pipe or toe drains and weep holes.
A wall that leans into the soil it retains is less likely to be pushed outward by soil pressure than a plain old vertical wall. Estimating stone and gravel for a retaining wall. The base of a retaining wall should be set below ground level. The taller a wall is the further below ground level it should be set.