INTENT:
To limit the probability of inadequate airflow through the
vented space, which could lead to:
- condensation in the space, or
- the formation of ice dams, which could lead to the ingress of
water.
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.
To exempt junctions of sloped roofs and exterior walls where
preformed baffles are installed from the minimum clear air space dimensions
specified in
Sentence
9.19.1.3.(1), based on the demonstrated effectiveness
of a reduced unobstructed space provided by insulation baffles.