What is a common consideration when plastering over gypsum board?

What is a common consideration when plastering over gypsum board?

• A. Gypsum board cannot be plastered
• B. No special requirements
• C. Use veneer plaster only
• D. Use veneer plaster or proper bonding agent; ensure smooth backing

Answer: (D)

The important idea here is that gypsum board needs a bonding-ready surface to accept plaster. Gypsum board isn’t suited to traditional plaster by itself, so you either use veneer plaster (a thin plaster finish designed for drywall) or apply a proper bonding agent to the board to create a good bond. After that, you must ensure the backing is smooth—fill joints, reinforce seams, and level any irregularities—so the plaster can lay down evenly without cracking or peeling. That combination—veneer plaster or a bonding agent plus a smooth backing—provides reliable adhesion and a clean finish.

The important idea here is that gypsum board needs a bonding-ready surface to accept plaster. Gypsum board isn’t suited to traditional plaster by itself, so you either use veneer plaster (a thin plaster finish designed for drywall) or apply a proper bonding agent to the board to create a good bond. After that, you must ensure the backing is smooth—fill joints, reinforce seams, and level any irregularities—so the plaster can lay down evenly without cracking or peeling. That combination—veneer plaster or a bonding agent plus a smooth backing—provides reliable adhesion and a clean finish.