Page 323 - Masonry and Concrete

Masonry Garden Walls

322 CHAPTER NINE

3 /4 LENGTH CLOSERS
1 /4 CLOSERS

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FIGURE 9-9

American or common corner bond.

measures must be taken to protect the wall, especially in cold climates
with a lot of rain or snow. Water that is trapped in a wall and then
freezes can expand and cause physical damage to the brick and mortar.
The course immediately below the coping should either be solid brick
without cores, or the cores should be solidly filled with mortar. It is
also very important that the collar joint between wythes be solidly
filled to eliminate voids in which water could collect and freeze. For
maximum weather protection, flashing should be installed immedi-
ately below the wall coping. Crimped copper or stainless steel is very
durable and comes in sheets about 1 in. narrower than the wall width.
The crimped shape allows the mortar to form a mechanical bond with

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