Of leveling sand and half the height of the first course of blocks.
How to build a concrete retaining wall footing.
How to build a concrete wall figure a.
Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on.
Of compacted base 1 in.
However it should always be below the seasonal frost line and that often is much deeper in northern climates.
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.
Concrete blocks are a common building material for a variety of outdoor projects such as retaining walls and out buildings like garages and tool sheds.
If you are new to this type of project here are a few tools and materials that you may need as well as some steps to help guide you through the process.
This should be done at every three blocks or at intervals specified by your local codes.
Because of this the footings will need to be built to create a sturdy base.
Thoroughly planned and ably performed wall construction will help to ensure the retaining wall s stability.
As the last step fill the cores around the rebar with mortar from the bottom to top.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
A retaining wall is used to stop soil or dirt in one area typically elevated from moving down to a lower area.
One key aspect of retaining wall construction is preparing a solid footing or foundation.
Follow the block manufacturer s instructions for wall height limits.
Retaining walls must be stronger than freestanding walls.
Expect to spend 20 36 hours building a 3x10 foot concrete block.
Insert rebar in the footing when you pour it.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.