Page 335 - Masonry and Concrete

Masonry Garden Walls

334 CHAPTER NINE

SCRATCH COAT
3 /8" THICK
MORTAR
JOINTS
STRUCK
FLUSH

FINISH
COAT
1 /8" THICK

FIGURE 9-23

Two-coat plaster application on concrete block wall.

joints in the concrete block wall, form a
stucco control joint in the same location.
When applying the plaster to the wall,
spread the mix up to either side of the con-
trol joint, leaving the metal slot empty.
SMALL NOSE DRIP MOLD
CORNER BEAD One of the most important things in
mixing plaster is consistency from batch to
batch. Always use a container for measur-
ing ingredients so that the proportional
CONTROL CASING BEADS
JOINT volume of materials is the same each time.
For both the base coat and the finish coat,
FIGURE 9-24 measure one part portland cement, one
Plaster accessories. part lime, and six parts sand or one part
masonry cement and three parts sand. The
amount of moisture in the sand will influence how much water is
needed in a plaster mix to get a good workable consistency. Bags of
sand bought for small projects will be dry. Bulk sand bought by the ton

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