Sentence 9.28.6.3.(1)

Intent 1:

To limit the probability of:

• drying before hydration is complete (or inadequate curing),
• the inadequate embedment of lath, which could lead to the corrosion of lath, or
• the excessive shrinkage of stucco under gravity or lateral loads, which could lead to cracking.

This is to limit the probability of an inadequate bond between lath and stucco, and the inadequate strength of stucco, which could lead to:

• excessive moisture transfer by capillary action, or
• inadequate strength to resist gravity, lateral, impact or abrasion loads, or freeze-thaw stresses.

Where stucco is applied to masonry chimneys, this is to limit the probability of precipitation or meltwater ingress, which could lead to the premature failure of chimney liners, which could lead to the leakage of carbon monoxide gas into living space, which could lead to the acute poisoning or asphyxiation of persons.