Wall foundations
For laying the first layer of building blocks it is necessary to use a hose level, or check the plane with a level instrument. Found the first layer on a continuous mortar line. Remove excessive mortar pressed out when building blocks are laid, and joint the wall continuously. Otherwise the mortars will not sufficiently bind. If the visible surface of split building blocks is soiled, clean them quickly and remove the dried-up mortar stains with a scrubber or pressure washing device (VAP) with a rotating jet and 20 MPa output. On smooth visible building blocks, you can use a fragment of same-colour building block and abrade carefully.
