Install the first course of blocks using a taut string line to establish a straight row.
How to build a wall on concrete blocks.
Prepare the footing spread mortar and build leads sliding the block over the rebar as needed.
Level to level blocks lengthwise and a torpedo level to level the front to back.
The concrete foundation needed to support a cement block wall is usually created by pouring concrete into a hollow form lining the sides of the excavation trench but the concrete can also simply be poured into the trench a common scenario for construction of a freestanding landscape wall.
Build end leads to corners.
Lay out the wall and excavate the slope and the footing trench.
Check the level and alignment of all blocks as you go along adjusting them with a rubber mallet.
How to do it.
Build the footing and insert rebar into the wet concrete at intervals corresponding to the cores in the 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.
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.
Fill the concrete cores with crushed gravel.
Make sure the footing depth extends below the frost line and check local building codes for construction requirements in your area.
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.
Build up the wall.
All concrete block walls both structural and non structural require a solid poured concrete footing.
How to build a concrete block wall with your own hands first it is necessary to prepare a solution for masonry.