PART F - LAYING UP THE CORNERS
After the first course of blocks are laid, build up the corners of the wall next, usually four or five courses
higher than the first course. As you lay up the corners, cut each course back one-half block.
2-15. Applying Mortar. For the horizontal joints, apply mortar only to the tops of the blocks already
laid. You may apply mortar for the vertical joints to the vertical end of the block to be laid, to the
vertical end of the block previously laid, or to both.
2-16. Using a Level. As you lay each course at the corner, check it with a mason's level for alignment.
Make sure that the corner is level and plumb (Figure 2-14). Check each block carefully, making certain
that the faces of the blocks are all on the same plane. This will ensure true and straight walls.
Figure 2-14. Aligning, leveling, and plumbing
2-17
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