Intent 1:
To limit the probability of:
- excessively thick mortar joints in relation to the surface
area of the masonry, which could lead to water leakage through shrinkage
cracks and water absorption through mortar joints, or
- excessively thin mortar joints, which could lead to
inadequate support of masonry or inadequate masonry-to-mortar bond
strength, which could lead to cracking.
This is to limit the probability of:
- compromised structural integrity of masonry construction,
- where masonry construction is part of an environmental
separator, the displacement or failure of required environmental separation
elements, which could lead to deterioration, or
- in assemblies exposed to moisture or the exterior, damage
and deterioration.
For floors and elements supporting floors, this is to limit
the probability of excessive movement, deflection or vibration, which
could lead to negative effects on the psychological well-being of
persons.