Understanding Plaster Finishes

Plaster finishes are common treatments applied to walls and ceilings, primarily for protection and decoration. They typically involve mixtures of cement, lime, gypsum, sand, and water.

• Rough-cast: A textured finish created by throwing a wet mixture of aggregate (like gravel or small stones) and cement/lime onto a base coat.
• Pebble dash: Similar to rough-cast, this finish involves embedding small pebbles or chippings into the final plaster layer while it's still wet.
• Sand faced: A textured finish achieved by applying sand to the surface of the wet plaster, often troweled to create a specific texture.

Identifying the Non-Plaster Option

The question asks to identify the option that is *not* a plaster finish. Evaluating the given choices:

• Rough-cast, Pebble dash, and Sand faced are all recognized types of textured plaster finishes.
• Wooden refers to a material (wood) or a finish made from wood. It is not a type of plaster application.

Therefore, 'Wooden' is the correct answer as it does not belong to the category of plaster finishes.

Conclusion: Wooden is not a plaster finish.