Sentence 9.19.1.2.(4)

Intent 1:

To limit the probability of unvented joist spaces, which could lead to:

• condensation,
• the accumulation of moisture, or
• the formation of ice dams.

This is to limit the probability of deterioration, which could lead to compromised structural integrity of attic or roof assemblies or of elements protected by attic or roof assemblies, which could lead to harm to persons.