Intent 1:
To limit the probability of inadequate provision
for drainage, which could lead to water pooling in cavities or air
spaces for extended periods.
This is to limit
the probability of:
- the deterioration of masonry due to freeze-thaw stresses,
which could lead to masonry falling, or
- the deterioration of elements inboard of the masonry,
which could lead to compromised structural integrity, which could
lead to structural collapse.
This is to limit the probability of harm to persons.