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.
How to build a concrete blocks retaining wall.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
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.
Check the level and alignment of all blocks as you go along adjusting them with a rubber mallet.
The success of your retaining wall depends on a level base.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
Once you ve got your base set up it just takes some finesse in building the wall up and turning corners.
Concrete blocks are ideal for building walls to hold back the soil after you dig into a slope for a pathway patio or another landscaping project block retaining walls are generally the same as freestanding block walls but with a few important differences.
The retaining wall can be made from concrete blocks poured concrete treated time boulders and rocks.
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.
So to make a retaining wall that will last as long as life you should consider going with concrete blocks.
Of leveling sand and half the height of the first course of blocks.
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.
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.
Of compacted base 1 in.
Follow the block manufacturer s instructions for wall height limits.
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.