Prepare the footing spread mortar and build leads sliding the block over the rebar as needed.
How to build a wall out of concrete blocks.
How to build a concrete block wall with your own hands first it is necessary to prepare a solution for masonry.
Fill the concrete cores with crushed gravel.
Lay out the first layer of cinder blocks.
Even a pebble on the surface of stackable retaining wall blocks will throw the one above it out of alignment.
Install the first course of blocks using a taut string line to establish a straight row.
Check the level and alignment of all blocks as you go along adjusting them with a rubber mallet.
It should be a mixture of sand and cement 4 1 diluted with water to consistency suitable for work.
Lay out your concrete block in a dry run spacing it with 3 8 inch plywood spacers.
That little stone will eventually create an unattractive hump in the top course.
Lay the first course 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.
The tops of cement block walls are typically capped by applying a layer of mortar embedding metal reinforcement strips then covering the wall with solid concrete cap blocks.
Once the first row is installed pack native soil to grade level on both sides of this course to anchor the wall in place.
How to do it.
Build up the wall.
Heavy retaining wall blocks the blocks we used in our demonstration weigh 14 pounds each keep the soil at bay with their weight.
If your wall is straight line up the first layer of cinder blocks from one end to the other end.
And that crooked block will affect the one above it and so on.
Starting at one end of the wall lay out the cinder blocks end to end until you reach the first turn in the wall.
You can also buy a ready dry mix glue which is diluted by simply adding water and stirred with a drill with a special nozzle.
Lay out the wall and excavate the slope and the footing trench.
Build the footing and insert rebar into the wet concrete at intervals corresponding to the cores in the blocks.
Retaining walls can be build of many different materials including wood timbers bricks or natural boulders.
Build end leads to corners.
Before you start lay out and pour footing.
Make sure joints between cap blocks are filled with mortar and smoothed with the finishing tool.