What is a solid plaster?

In New Zealand, solid plaster refers to a traditional method of wall cladding and finishing that involves applying a thick layer of plaster directly onto the substrate. It is a form of exterior plastering that provides a durable and weather-resistant finish for buildings.

Solid plastering typically involves the following steps:

  1. Substrate Preparation: The underlying surface, which can be made of materials such as concrete, blockwork, or timber, is prepared by ensuring it is clean, level, and free from any contaminants or loose materials.
  1. Application of Base Coats: A base coat, also known as a render or scratch coat, is applied directly to the prepared substrate. It is usually a mixture of cement, sand, and sometimes lime, which provides a solid foundation for the subsequent layers.
  1. Levelling and Keying: The base coat is screeded or floated to achieve a level surface and provide a textured key for the subsequent layers of plaster.
  1. Application of Finishing Coats: One or more finishing coats, also known as the top coats or texture coats, are applied over the base coat. These coats are typically a mixture of cement, sand, and additives, which may include pigments for coloration or polymer modifiers for improved adhesion and flexibility. The finishing coats can be troweled, textured, or floated to create different surface finishes, such as smooth, textured, or decorative patterns.
  1. Curing and Protection: After the application of the finishing coats, the plaster needs to cure and harden. It is essential to protect the freshly applied plaster from excessive moisture, temperature fluctuations, and direct sunlight during the curing process to ensure its proper bonding and long-term durability.

Solid plastering is commonly used in New Zealand for residential and commercial buildings, providing both functional and aesthetic benefits. It offers protection against weather elements, enhances the building’s appearance, and can be customized with various textures and finishes to achieve the desired architectural style.

It’s worth noting that solid plastering techniques and practices may vary slightly depending on regional preferences, specific building requirements, or the use of proprietary systems or products. Consulting with our local plastering professionals at Your Plasterers Auckland or industry experts can provide more detailed and region-specific information on solid plastering in New Zealand.