To limit the probability of the inadequate embedment
of lath in stucco, which could lead to the deformation or cracking
of stucco due to excessive shrinkage.
This is
to limit the probability of:
precipitation or meltwater ingress, which could lead
to deterioration, which could lead to the structural failure of exterior
walls or elements protected by exterior walls, or
stucco detaching and falling from the building.
This is to limit the probability of harm to persons.