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GWB edge conditions

Which of these edge conditions for gypsum wallboard allows finishing by taping and filling (with joint compound) to produce an invisible seam between sheets; a smooth, monolithic appearance ready for final finishing?
A. Tapered
B. Tongue-and-groove
C. Beveled
D. Square
AnswerA. Tapered. B. and D. are used for base or intermediate layers. C. and D. are pre-finished boards, often received by various edge beads or trims.
ARE 4.0 exam prep: BDCS

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