head joint. After bedding the brick, cut off the excess
mortar and use it to start the next end joint. Throw any
surplus mortar back on the mortar board where it can
be restored to workability.
Figure 4-12 shows how to insert a brick into a
space left in a wall. First, spread a thick bed of mortar
(view 1), and then shove the brick into the wall space
(view 2) until mortar squeezes out of all four joints
(view 3). This way, you know that the joints are full
of mortar at every point.
To make a cross joint in a header course, spread
the bed joint mortar several brick widths in advance.
Then spread mortar over the face of the header brick
Figure 4-12.Inserting a brick in a wall space.
Figure 4-13.Making a cross joint in a header course.
before placing it in the wall (fig. 4-13, view 1). Next,
shove the brick into place, squeezing out mortar at the
top of the joint. Finally, cut off the excess mortar, as
shown in view 2.
Figure 4-14 shows you how to lay a closure brick
in a header course. First, spread about 1 inch of mortar
on the sides of the brick already in place (view 1), as
well as on both sides of the closure brick (view 2). Then
lay the closure brick carefully into position without
disturbing the brick already laid (view 3). If you do
disturb any adjacent brick, cracks will form between
the brick and the mortar, allowing moisture to penetrate
the wall. You should place a closure brick for a