Solid Plaster’s Thermal insulation properties

Solid plastering does provide some degree of thermal insulation, although its effectiveness may vary depending on factors such as the thickness of the plaster, the composition of the materials used, and the overall construction of the wall assembly. Here’s an explanation of how solid plastering can contribute to thermal insulation:

  1. Thickness: Solid plastering involves applying a relatively thick layer of plaster to the walls, which adds an extra barrier of material. This additional thickness helps to reduce the transfer of heat through the wall assembly.
  1. Density: The density of the plaster mixture used in solid plastering can affect its thermal insulation properties. Plasters with higher density tend to have better thermal insulation capabilities, as they provide a denser layer of material that resists heat flow.
  1. Air Pockets: During the application of the plaster, small air pockets or voids may be created within the plaster layer. These air pockets can act as insulation by trapping pockets of air, which is a poor conductor of heat. The trapped air helps to slow down heat transfer through the plaster.
  1. Moisture Content: Moisture content in the plaster can also influence its thermal insulation properties. Damp plaster may have a lower thermal resistance compared to dry plaster, as moisture can conduct heat more easily. It’s essential to ensure proper curing and drying of the plaster to optimize its thermal insulation capabilities.

While solid plastering can contribute to thermal insulation to some extent, it is important to note that its insulation value is typically lower compared to dedicated insulation materials such as foam boards or batt insulation. If maximizing thermal performance is a priority, additional insulation measures such as insulation batts, reflective foils, or insulation systems can be incorporated into the wall assembly alongside solid plastering.

It’s recommended to consult with our professionals at Your Plasterers Auckland and others in the field of construction and insulation to assess the specific thermal insulation requirements of your project and determine the most effective combination of materials and techniques to achieve the desired thermal performance.