NM CID GS-30 Practice Questions - New Mexico CID GS-30 Plastering, Stucco And Lathing Examination Exam

Why must Class PB EIFS not be specified or inspected as if it were ASTM C926 three-coat stucco?

They use the same 7/8 in. coat schedule, so either standard may be cited EIFS is a thin polymer lamina over insulation with different drainage, attachment, and thickness rules; C926/C1063 govern portland cement plaster over lath or solid bases EIFS never requires a water-resistive barrier, unlike stucco C926 is only for interior gypsum work

Correct Answer:

EIFS is a thin polymer lamina over insulation with different drainage, attachment, and thickness rules; C926/C1063 govern portland cement plaster over lath or solid bases

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