Of space behind it.
Making concrete retaining wall blocks.
Be sure to start alternate courses with a half block.
Mix the fill mortar slightly wetter than what you d use for joints.
Of compacted base 1 in.
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.
Spread additional mortar and lay cap block to finish the wall.
Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on.
To create a solid foundation dig a trench for the first course of your interlocking retaining wall blocks to sit in and make sure the ground remains even throughout.
If your concrete wall turns a corner build the corner with alternating corner blocks.
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.
Check the level and alignment of all blocks as you go along adjusting them with a rubber mallet.
Begin digging into the ground with a shovel.
Fill the concrete cores with crushed gravel.
After setting the corner block butter the ears of the adjacent block and set it.
A locking flange on the blocks for this project makes your retaining wall ideas easier to accomplish.
Follow the block manufacturer s instructions for wall height limits.
How to build a concrete wall figure a.
Smooth the top with a trowel.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
Size the trench so there s enough room for the retaining wall block and at least 8 in.
Of leveling sand and half the height of the first course of blocks.
Start the first leg with a full corner block which is a stretcher block with a finished face on one end.