How Insulguard insulation Perth Works
Cavity Shield is a highly efficient and cost effective thermal insulation that greatly slows the heat transference through the EPS and trapped air. InsulGuard fills the void that facilitates conduction, convection and radiation of heat in building cavities. This in turns helps maintain internal temperatures within a more comfortable range, reducing the need for active heating and cooling systems and lowering costs.
Heat Flow Terms and Comparisons
Within a material or between materials in close proximity heat will flow from a higher temperature to a lower temperature through one, or any combination of all three-heat transfer methods conduction, convection and radiation.
The rate at which heat will flow through a material or between materials is dependent not only on the nature of the materials, but also upon the difference in temperature between the hot and cold sides. Comparison of the effectiveness of insulation must be made on a basis, which excludes the influence of variable factors such as thickness and temperature differences. This comparison of thermal conductivity can be measured by the Thermal Conductivity (‘k’ value)
thermal conductivity – k value measured in w/mk
The k value, or thermal conductivity, specifies the rate of heat transfer in any homogeneous material. If a material has a k value of 1 it means a 1 metre cube of material will transfer heat at the rate of 1 Watt for every degree of temperature (Kelvin) difference between opposite faces. The k value is expressed as 1W/mK.
Note: The lower the k value the more effective the insulation material
EPS has a remarkably low k value compared with most other insulating materials used in similar applications.
thermal conductance – c value (w/m2k)
The Thermal Conductance or C value refers to any thickness of a material or structural component such as a wall or floor.
Thermal conductance is the amount of heat energy transmitted through unit area of a structural component or of a structure per unit temperature difference between the hot and cold faces. The value of C is expressed in W/m2K.
thermal resistance – r value (m2k/w)
The R value, or thermal resistance of a material, expresses the ability of a particular thickness of that material to resist heat flow i.e. R = thickness of material/k value. It is the inverse of Thermal Conductance. The R-value is a measure of the ability of a particular material to resist heat flow.