Retaining Walls 


 Modular Block Stairs 


 Benefits of having a modular block retaining wall:

  • Protects existing structures

  • Will last forever

  • Creates extra space

  • Can solve existing erosion issues

  • Will prevent flooding

  • Adds to appeal of your home

  • Low maintenance 


General Installation Process:

  1. Footings are dug and soil should be probed to ensure soil is compacted. Poor compaction or loamy soil will cause a retaining wall to sink.

  2. Footings are typically 6" to 12" thick and built with #57 aggregate stone.

  3. The first course of block will be set level on top of the gravel footing. This block will be partially buried to protect the footing from erosion.

  4. A slotted pipe will be placed behind larger walls to act as a french drain. This will eliminate hydraulic pressure behind the wall.

  5. As additional courses of block are added to the wall #57 stone aggregate is placed behind the wall.

  6. This allows water to flow down to the french drain pipe.

  7. As the wall rises in height, fill dirt is compacted in layers behind the retaining wall. Compaction is extremely important when larger walls are constructed.

  8. Geogrid is placed in between the rows of block and is buried behind the wall. The length, strength, and placement of Geogrid is determined by the engineering.

  9. A decorative cap is used to cover the top of the wall. The cap is adhered with concrete adhesives.


Every municipality varies on height requirements for engineering and permits for modular block walls. RPM has partnered with a local engineer to provide these services to clients.


*Some details vary depending on the retaining wall engineer.

Serving Acworth, Kennesaw, Marietta, Woodstock, Canton and Cartersville since 1999

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