Illinois Roofing Practice Exam 2026 – 400 Free Practice Questions to Pass the Exam

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What size should water and ice dam protection be for a roof slope less than 4:12?

A 18 inches

B 24 inches

C 36 inches

Water and ice dam protection for a roof slope less than 4:12 should typically extend at least 36 inches from the interior wall line. This measurement is necessary to prevent water infiltration and ice dams from forming, which can cause damage to the roof and the interior of the building. Extending the water and ice dam protection beyond this recommended size ensures proper protection against potential water damage.

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D 48 inches

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