Masonry Flashing

Question 1

slope of the coping called

Answer 1

the wash

Question 2

tops of walls/parapet flashed,

and capped w

Answer 2

coping

Question 3

base flashing installed at bottom of exterior wythe,

extend …

Answer 3

up 8-10” and set in joint in interior wythe.

Question 4

weep holes located

Answer 4

24” OC horizontally,
in lowest course of brick.

and over windows,
+ shelf angles.

Question 5

today openings are typ. spanned w:

Answer 5

steel lintels

Question 6

alts to steel lintels

Answer 6

concrete beam,
or masonry bond beam.
(fully grouted/reinforced)

Question 7

lintel carries load in triangular area w in __º from each side of opening

Answer 7

60

Question 8

white deposit of salts

Answer 8

Efflorescence

Question 9

efflorescence caused by

Answer 9

materials w soluble salts

Question 10

efflorescence removed by

Answer 10

dry brushing,

or washing w 5% solution muriatic acid.

Question 11

@ completion of a job, brick cleaned w

Answer 11

5-10% solution muriatic acid

Question 12

problem w High Pressure Washing

Answer 12

may wash away mortar and create swirls

Question 13

Water and Brush are best cleaners for

Answer 13

soft brick

Question 14

used for cleaning stubborn dirt/stains

Answer 14

Acid Solutions

Question 15

technique used if mortar has fallen out

Answer 15

mortar removed to about 2.5x width of the joint,

cleaned, wetted,
new mortar pressed in,
w special tool.

Question 16

best mortar for tuckpointing (repointing)

Answer 16

high lime mortar is best, applied in layers.

after previous is thumbprint hard