Page 334 - Masonry and Concrete

Masonry Garden Walls

333
MASONRY GARDEN WALLS

STONE COPING OR
FLAT COPING BLOCK
FLASHING
CORES IN TOP COURSE
GROUTED SOLID

SCREEN WIRE
ACTS AS DAM
TO CONTAIN
GROUT

FIGURE 9-22
CMU wall copings.

as it is usually called, is also a popular finish for gray block walls, and
the block’s rough texture provides an excellent substrate with good
adhesion. When applied over concrete or concrete block, stucco can be
applied in two layers rather than the usual three required over metal
lath and studs (Figure 9-23). There are four types of metal accessories
used with stucco applications over concrete block: corner “beads” for
making corners sharp and true to a line, drip screeds used at the bottom
of a wall to stop the plaster just above the ground, control joint strips,
and casing beads for working up to window and door frames, gate
posts, or other abutting surfaces (Figure 9-24). Stucco accessories are
attached to CMU walls with masonry nails. For a softer and less con-
temporary look, corner and casing beads can be omitted and the stucco
edged by hand with an intentional imperfection of line.
Stucco, like any portland cement product, shrinks as it cures and
dries out, so control joints must be incorporated in the finish. For apply-
ing stucco over concrete block, control joints should be formed using a
hot-dip galvanized or zinc control joint strip. Wherever there are control

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