Follow the block manufacturer s instructions for wall height limits.
How to build a retaining wall with concrete base.
Dig into hillside 2 ft.
Dig a base trench 24 in.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
So to make a retaining wall that will last as long as life you should consider going with concrete blocks.
The success of your retaining wall depends on a level base.
Of compacted base 1 in.
There are materials as well but they don t last long.
More information on retaining walls where the base trench steps up a slope.
Dig out dirt along base of wall to accommodate 6 inches of crushed stone.
That s right the idea is that.
Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on.
Rather than messing around with mortar they lay the walls down like lego pieces using concrete while it s still in the bag.
150 mm plus an additional 1 in.
So diyers have come up with an interesting trick.
Retaining wall base trench.
How to build a concrete wall figure a.
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.
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.
Uncontrolled water weakens walls.
600 mm wide the length of the wall the depth of the trench will be 6 in.
Building a retaining wall in the conventional ways is not a trivial matter.
25 mm for each 1 ft 300 mm of wall height for the amount or buried block that is needed.
Water can weaken retaining walls by washing out the base material that supports the wall.
The retaining wall can be made from concrete blocks poured concrete treated time boulders and rocks.
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.
That s when walls start leaning bulging and toppling.
But far more frequently it causes problems by building up behind the wall saturating the soil and applying incredible pressure.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
Stretch a level line between wood stakes to establish the wall height.
Back from face of retaining wall.
Add 6 inches of stone then compact it with a hand tamper.