Sentence 9.26.4.5.(2)

Intent 1:

To limit the probability of:

• temporary ponding of water, or
• where the sheathing membrane does not overlap the vertical leg of the flashing, water descending on the face of the sheathing membrane and behind the flashing.

This is to limit the probability of precipitation or meltwater ingress, which could lead to deterioration, which could lead to the structural failure of roofs or walls, or elements protected by such assemblies.

This is to limit the probability of harm to persons.