Follow the block manufacturer s instructions for wall height limits.
How to build a tall concrete retaining 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.
The 8 foot wall actually needs to be four times stronger.
By using the information we have on building retaining walls you will get everything you need to plan design and build the perfect retaining wall project.
Of compacted base 1 in.
A poured wall is much stronger and generally last many more years than a block wall.
For example a retaining wall 8 feet tall is not just twice as strong as a wall 4 foot tall.
Traditionally retaining walls were built with standard concrete blocks known as cmus concrete masonry units or cinder blocks as they re more commonly known in the u s.
How to build a retaining wall.
Concrete retaining wall footing size the depth to the bottom of the base slab should be kept at a minimum of two feet.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
Use the plan design menu above to check out all of the information we have on how to build.
Pouring a concrete retaining wall is not that difficult and this easy to follow how to guide will show you just what to do.
Typically measuring 8 by 8 by 16 inches these hefty guys feature two openings aka cells that help stabilize the wall with the help of rebar running through them.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
In general the top of the stem of any cast concrete retaining wall should not be less than 12 inches for the proper placement of concrete.
If you want to build a concrete retaining wall you should consider pouring the wall rather than making it out of concrete blocks.
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.
Of leveling sand and half the height of the first course of blocks.