Of leveling sand and half the height of the first course of blocks.
How to build a concrete blocks retaining wall.
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.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
Of compacted base 1 in.
Foundation all concrete block walls must rest on a sturdy foundation of poured concrete.
The success of your retaining wall depends on a level base.
So to make a retaining wall that will last as long as life you should consider going with concrete blocks.
How to build a concrete wall figure a.
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.
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 retaining wall can be made from concrete blocks poured concrete treated time boulders and rocks.
Whether you re building a retaining wall or just need some extra privacy a cinder block wall is an affordable way to get the job done.
Once you ve got your base set up it just takes some finesse in building the wall up and turning corners.
Follow the block manufacturer s instructions for wall height limits.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
There are materials as well but they don t last long.
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.
The depth and size of the foundation will vary depending on the size of the concrete block wall and the weight it must support but a typical freestanding wall requires a foundation that is about twice as wide as the wall itself and which extends about 1 foot down below the frost line.