by Raymond Alexander Kukkee

Created on: August 10, 2008   Last Updated: March 30, 2011

Build a Cinder Block Retaining Wall

"Cinder block?" Why would you want to build your retaining wall out of cinder block?"

"I like cinder block better, it's lighter to work with than concrete blocks, and won't rot like timbers do".

"But for a retaining wall? You want heavy block for a retaining wall, don't you?"

When considering building a retaining wall with cinder block, that may be a logical question. The purpose of any retaining wall is to prevent soil erosion, and downhill or ground movement, so to some extent, weight is a relevant factor. A retaining wall is much like a dam, and must withstand the forces of direct soil pressure, but it must also withstand settling, and the destructive heaving and displacement by frost.

A cinder block wall properly designed can respond to these challenges.

Essential structural considerations include adequate design and provision for drainage, footings, stability, and mechanical reinforcement of the wall itself. Remember that design becomes more critical with increased height. 

Here is how to build a cinder block retaining wall, keeping these critical aspects in mind.

Design the wall:

Make a drawing to ensure details are not overlooked. Are you building the retaining wall in an area that has deep, severe frost penetration? If so, your footings must be deeper than the frost penetrates to be stable.

What are soil conditions like, is the ground wet continuously? Plan for control of surface water and groundwater disposal if necessary. How high will the wall be? Structural integrity and safety issues start to become a matter concern if a wall is over 6' in height. Consider building successive walls 2' high instead, and take advantage of the usable level spaces between them for landscaping and features.

Will the wall be constructed with mortar? If so, you require a solid concrete footing.

* Note: If you have to dig deeply, be sure to contact your local utilities to locate any cables, pipes, or other superstructure.Do you need a building permit?

Tools and Supplies Required :

• Carpenter's line and chalk line
• Carpenter's 4' level, line level (use laser level or transit if available)
• Measuring tape
• Shovel, Picks, hammer, sledge hammer
• Pickets
• Dimensioned lumber to build footing forms
• Cinder blocks 8x8x16 or 10x8x16
• Steel reinforcing bar, galvanized deadmen anchor cables
• Concrete (ready-mix delivery) and cement mortar for block-laying.

• 1
• 2
• 3
• Next Page >>