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Roofing & Weatherproofing Standards Flashcards

7 cards from real CCI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Roofing & Weatherproofing Standards flashcards as text

  1. Per IRC Section R905.1.1, what is the minimum slope requirement for asphalt shingles when double underlayment is not used?

    Answer: 3:12

    IRC requires a minimum 3:12 slope for standard asphalt shingle installation without the additional protection of double underlayment.

  2. What is the term for the upward deflection of a roof membrane or panel caused by differential air pressure between the interior and exterior of a building?

    Answer: Wind uplift

    Wind uplift occurs when wind creates a pressure differential that exerts an upward force on roof membranes or panels, potentially causing separation.

  3. A CCI inspector finds that modified bitumen roofing membrane laps are only 2 inches wide. What is the correct minimum lap width per industry standards?

    Answer: 6 inches

    Modified bitumen membrane side laps and end laps require a minimum 6-inch overlap to ensure a watertight seal.

  4. Which ASTM standard governs the testing of asphalt shingles for physical properties including wind resistance?

    Answer: ASTM D3462

    ASTM D3462 is the standard specification for asphalt shingles made from glass felt and surfaced with mineral granules, including wind resistance testing.

  5. When inspecting roof drainage, what is the maximum allowable area of roof that one 4-inch diameter drain can typically serve under IPC standards?

    Answer: 2,000 sq ft

    Under IPC guidelines, a single 4-inch roof drain can typically serve up to 2,000 square feet of roof area based on standard rainfall intensity calculations.

  6. What is the recommended minimum R-value for roof insulation in Climate Zone 5 per ASHRAE 90.1?

    Answer: R-30

    ASHRAE 90.1 recommends a minimum R-30 for roof/ceiling assemblies in Climate Zone 5 to meet energy code requirements.

  7. Which type of roofing membrane is installed in a single layer and relies on vulcanized rubber chemistry for its weatherproofing properties?

    Answer: EPDM

    EPDM (Ethylene Propylene Diene Monomer) is a single-ply membrane made from vulcanized synthetic rubber, widely used in commercial low-slope roofing.