Overall, the advantages of building a cinder block house override the disadvantages. Unfortunately, cinder blocks will require skilled labor to lay each block down, adding to the building cost.Cinder blocks lack precise geometry, which means you'll need to file and grind them to make their surfaces smooth. The cores inside the blocks can also fill with water, saturate the blocks, and create dampness inside basements. Spread a 2-inch layer of sand or gravel over the area where the first row of blocks will be laid.Here is another downside for block walls they are more prone to water leaks because of the number of joints between each block. The porous layer will help with drainage on the completed wall and will also make it easier to level the first row of blocks.
A retaining wall will be most stable if it is built over a porous base.
