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.
How to build a retaining wall with concrete blocks.
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.
A retaining wall will normally have a high newton block reinforced concrete wall often with piers sitting on a reinforced foundation even a low one with if required a fair face wall sitting in front.
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 success of your retaining wall depends on a level base.
Of compacted base 1 in.
How to build a concrete wall figure a.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
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.
There are materials as well but they don t last long.
Retaining walls can be build of many different materials including wood timbers bricks or natural boulders.
Check the level and alignment of all blocks as you go along adjusting them with a rubber mallet.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
The wall will also have weep holes to prevent the build up of water behind the wall.
So to make a retaining wall that will last as long as life you should consider going with concrete blocks.
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.
Of leveling sand and half the height of the first course of blocks.
But for diyers retaining wall blocks made of concrete are the best solution.
Heavy retaining wall blocks the blocks we used in our demonstration weigh 14 pounds each keep the soil at bay with their weight.