Veneer plaster is typically applied to which substrates?

Veneer plaster is typically applied to which substrates?

• A. Brick
• B. Concrete block
• C. Gypsum board or blueboard
• D. Plywood

Answer: (C)

Veneer plaster relies on a thin, bondable base that can receive the plaster finish with a good key. Gypsum board and blueboard are designed for plaster finishes: they provide a smooth, consistent surface and readily accept the bonding agent needed for veneer plaster, giving a durable, uniform coat. Brick or concrete block are masonry substrates that require thicker, traditional cement-based plaster finishes, not a thin veneer coat. Plywood isn’t suitable because it doesn’t provide stable, porous adhesion and can swell, warp, or delaminate under plaster. So the typical substrates for veneer plaster are gypsum board or blueboard.

Veneer plaster relies on a thin, bondable base that can receive the plaster finish with a good key. Gypsum board and blueboard are designed for plaster finishes: they provide a smooth, consistent surface and readily accept the bonding agent needed for veneer plaster, giving a durable, uniform coat. Brick or concrete block are masonry substrates that require thicker, traditional cement-based plaster finishes, not a thin veneer coat. Plywood isn’t suitable because it doesn’t provide stable, porous adhesion and can swell, warp, or delaminate under plaster. So the typical substrates for veneer plaster are gypsum board or blueboard.