How To Build A Block Wall On A Concrete Slab
Fill the block cells empty cavities with concrete up to the top of the first course and trim with a trowel.
How to build a block wall on a concrete slab. Exterior wall on slab must be out on the edge. For a freestanding landscape wall this involves creating a simple rectangular outline of the planned foundation. The process starts on the top of the. Start the third layer with a regular cinder block and build out.
Reinforced block and concrete walls block foundations use cinder blocks 8 x 8 x 16 inches that are stacked on each other and cemented in place with mortar. Set out the first row of cinder blocks without mortar and adjust and move your wall as needed until you are satisfied with the layout. Once this concrete has cured it will have created a bond between the block rebar and concrete slab forming a single structural unit and the rest of the blocks can be laid as normal. Start the fourth layer with a half block and continue starting layers with half blocks every other layer until your wall has reached the desired height.
The first step in building a concrete block wall is to lay out the foundation using stakes and masonry string. This prevents water from leaking under the bottom of the wall to the inside of the building. An exterior wall must be placed on the outside edge of the slab so the exterior siding laps down and over the edge of the slab. Step 2 mix the mortar according to the directions on the package.