Smooth the top with a trowel.
Concrete bag retaining wall diy.
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.
Of leveling sand and half the height of the first course of blocks.
Spread additional mortar and lay cap block to finish the wall.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
That s right the idea is that you don t open the packaging.
Leave the concrete in the bag stack like legos wet with a hose core77 building a retaining wall in the conventional ways is not a trivial matter.
From a cost perspective basic wall blocks would look much better and be cheaper you could set them up as a pair if you need to extend beyond the 2 foot height limit.
Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on.
Step 7 fill the trench between the dirt and the concrete wall with some gravel.
Rather than messing around with mortar they lay the walls down like lego pieces using concrete while it s still in the bag.
Of compacted base 1 in.
Mix the fill mortar slightly wetter than what you d use for joints.
An easy way to build retaining walls.
Over time the bags will degrade and you will have an elegant and permanent retaining wall.
How to build a concrete wall figure a.
So diyers have come up with an interesting trick.
Set it back about a half to a quarter inch so the wall will lean gently into the hill.
Video of the day.
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.
Once the bags are laid you wet everything down thoroughly with a hose saturating all of the bags.
A verysimple concrete bag retaining wall with no work.
Concrete runs about 4 bucks a bag and at height of 3 or so would require a good number to provide 3 feet of wall.