Inside 90° Corners
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 Starting at the corner |
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 To create an inside 90° corner, begin by placing a block at the corner. Then lay a second block perpendicular to the first and continue laying out the rest of the base course working from the corner out. Make sure to construct the base course according to standard site prep and installation procedures.
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 Second course |
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 On the second course, place all blocks on bond along one side of the corner. Once the second course of one wall is established, begin the second course of the adjacent wall. Split units* may be required on this wall to maintain running bond.
*To split a block, use a hammer and chisel to score the block on all sides. Pound the chisel on the score line until the block splits. If partial unit sides are not exposed, use a circular saw and cut-off saw with masonry blade to achieve a tighter fit.
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 Alternate corner block placement |
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 Block placement in the corner should alternate direction with each succeeding course.
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Outside 90° Corners
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| Place a half unit at the corner |
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 To build an outside 90° corner begin by placing a partial unit at the corner. Remove the locator lip so that the block lies flat. Then lay the rest of the base course working from the corner block out.
For some products, you will need to use a circular saw with a masonry blade. Cut a 45-degree angle on two blocks. Cut from the front corner to the back of the block. Glue pieces together with construction adhesive so two block faces form the finished outside corner.
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| Additional courses |
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 Begin the second course with another partial unit sized to stagger the bond. Place the second and third blocks on either side of the corner unit. Once the corner unit is in position, affix block in place with a concrete adhesive. Continue to alternate the corner unit orientation with each course and always use a concrete adhesive.
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| Use splits |
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 Use split* units as necessary to maintain running bond.
*To split a block, use a hammer and chisel to score the block on all sides. Pound the chisel on the score line until the block splits. If partial unit sides are not exposed, use a circular saw with a masonry blade to achieve a tighter fit.
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Tip:
Placing a thin layer of sand in the bottom of your trench makes the first course leveling process easier. |
