In an area where ice dams are a code concern, how far must the roof ice barrier extend into the building under the IBC roof-underlayment rule?
Correct Answer
D) At least 24 in. inside the exterior wall line
The IBC ice-barrier rule requires the barrier to extend from the lowest roof edges to a point at least 24 in. inside the exterior wall line of the building. Other choices stop too soon or overextend the requirement into a full-roof membrane.
Why This Is the Correct Answer
The IBC ice-barrier rule requires the barrier to extend from the lowest roof edges to a point at least 24 in. inside the exterior wall line of the building. Other choices stop too soon or overextend the requirement into a full-roof membrane.
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