Masonry Magazine July 1969 Page. 23
SEALANT
FULL SIZE DETAIL
FLASHING
CONTINUOUS INSULATION
LINTEL
BLOCK FILLED
WITH GROUT
PRECAST COPING
CONCRETE MASONRY
COPING BLOCK
MAY BE USED
CONTINUOUS FLASHING
FILLET
PORTLAND CEMENT PLASTER
CONTINUOUS FLASHING
FLASHING
1" INSULATION
ROOFING
CONCRETE MASONRY FLOOR
AND ROOF SYSTEM
PARAPET CONSTRUCTION
Bent down over the lintel to form a drip.
CHIMNEY FLASHING
Flashing around chimneys is much the same as base flashing-turned up against the masonry with "counter" flashing overlapping the base.
PARAPET FLASHING
Continuous through-wall flashing should be employed under parapet coping; at juncture of roof and parapet, flashing should extend up the parapet vertically for a distance of 8" and should be overlaid with counter flashing which is also continuous, and laid into the horizontal mortar joint.
MORTAR JOINTS
Concave and V-shaped mortar joints should be used for exterior concrete masonry walls in preference to struck or raked joints that form small ledges which may hold water. The use of modular-size masonry units is recommended. This size will result in mortar joints approximately %" thick. Forming concave joints and V-shaped joints tends to compress the mortar and create a firm bond between mortar and concrete masonry unit. Forming of struck and raked joints tends to draw the mortar away from the units.
The most important single factor in the construction of dry masonry walls is the filling of the mortar joints. Workmanship, or lack of good workmanship, has repeatedly been observed as the greatest cause of water leakage. A lack of care in filling mortar joints results in voids in the mortar through which water may flow. Face shells of concrete masonry units should be fully bedded with mortar. The mortar bed should not be spread too far ahead of the masonry units. Head joints should be solidly filled with mortar. In composite wall construction, the collar joint should be filled solidly. In addition, it is extremely important to mortar bond that the masonry unit not be moved or otherwise disturbed once it has been placed in the mortar bed and leveled. If a unit must be moved after laying, it should be taken completely out of the wall and re-mortared.