NV C-17C Drywall Practice Questions - Nevada C-17C Drywall Contractor Examination Exam

May gypsum lath or gypsum wallboard be used as a backing for cement plaster on a vertical exterior wall?

Yes, below the weep screed only No, except that with a water-resistive barrier it may back self-furring lath and cement plaster on ceilings or soffits, or on interior walls Yes, on any exterior wall without a water-resistive barrier Yes, if the gypsum is Type X

Correct Answer:

No, except that with a water-resistive barrier it may back self-furring lath and cement plaster on ceilings or soffits, or on interior walls

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