Fill the concrete cores with crushed gravel.
Making concrete retaining wall blocks.
Follow the block manufacturer s instructions for wall height limits.
If your concrete wall turns a corner build the corner with alternating corner blocks.
Check the level and alignment of all blocks as you go along adjusting them with a rubber mallet.
Of leveling sand and half the height of the first course of blocks.
A locking flange on the blocks for this project makes your retaining wall ideas easier to accomplish.
Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on.
Establish a level trench to ensure an even layer of base material.
Lay the first course staring at one end place the first course of concrete blocks top side up on the crushed rock with the front lip facing up and towards the front of the wall.
Smooth the top with a trowel.
Size the trench so there s enough room for the retaining wall block and at least 8 in.
Mix the fill mortar slightly wetter than what you d use for joints.
Spread additional mortar and lay cap block to finish the wall.
Be sure to start alternate courses with a half block.
After setting the corner block butter the ears of the adjacent block and set it.
Begin digging into the ground with a shovel.
How to build a concrete wall figure a.
Of space behind it.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block.
Using a tape measure decide the length and the width of your retaining wall then mark off the area with the garden stakes and string.
Excavate deep enough to completely bury at least one full course including space for 6 to 8 in.
When you reach the finished height of the concrete block retaining wall fill those cores containing rebar to the top with mortar.