Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
Concrete bag retaining wall instructions.
We re using a dry bag method stacking in courses and stabilizing wit.
Use proper lifting methods when handling concrete bags because they are very heavy.
Of compacted base 1 in.
When i made my wall the bags of concrete were made of only paper but apparently they are now made with a plastic like liner.
If you are building a retaining wall taller than five levels let the first five levels dry before adding another five levels.
2 feet is the max height for those blocks and if built on a proper base and with the first course level you can backfill the wall up to 2 feet tall.
Step 7 fill the trench between the dirt and the concrete wall with some gravel.
A verysimple concrete bag retaining wall with no work.
Offset the next row by about half or a third of the length of the concrete bag while stacking it on top of the first row.
Add levels of bags in increments of five until your wall reaches the necessary height.
Flip each block up and apply the adhesive to the layer below and then set the blocks back down being careful not to let dirt or rocks get between the blocks.
Of leveling sand and half the height of the first course of blocks.
Once the concrete sets up you can either wait for the paper to biodegrade peel it off or burn it off.
Once the bags are laid you wet everything down thoroughly with a hose saturating all of the bags.
How to build a concrete wall figure a.
For these 6 x16 retaining wall blocks you only need to glue the top row.
If you are using smaller blocks then gluing each row is a good idea.
There are other important steps in this process such as proper backfill and drainage to remove water from behind the wall.
Set it back about a half to a quarter inch so the wall will lean gently into the hill.
Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on.
Just stack up bags on concrete leave them as is through a few big rains ir thoroughly soak a few times and then tear off paper voila.