Seamless Thermal Insulation

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Seamless Thermal Insulation

Thermal insulation is a reduction in heat transfer (i.e. heat transfer between objects of different temperatures) between objects in thermal contact or in an area exposed to radiation. Thermal insulation can be achieved thanks to specially developed methods or procedures, as well as appropriate shapes and materials of objects. Heat flow is an unavoidable consequence of contact between objects of different temperatures. The insulating capacity of the material is measured as the inverse of thermal conductivity (k). In thermal engineering, other important properties of insulation materials are product density (r) and specific heat capacity (c). Thermal insulation improves the energy efficiency of domestic or commercial buildings whilst enabling the extensive use of glass and the benefit of passive solar gain.

Thermal Insulation Mechanism

Insulation means creating a barrier between a hot and cold object that reduces heat transfer by reflecting heat radiation or reducing heat conduction and convection from one object to another. Depending on the barrier material, the insulation is more or less effective. Very low heat-conductive barriers are good heat insulators, while very good heat conductive materials have low insulation capacity. In most production processes, energy is the most expensive element after raw materials, which is why thermal insulation is crucial. Thermal insulators capture gas bubbles in the foam structure. When these gas cells are filled with moisture, there is a significant loss of insulation efficiency. Moisture absorption by insulating materials can take place not only through direct contact with water entering the walls of the space it is in but also by condensation of water vapour in the walls, in which the dew point (temperature gradient) is reached by the walls. 

Ultimately, thermal insulation is a valuable investment. Thermal insulation materials must be resistant to heat and fire, but must also be adapted to a wide range of different environments and circumstances. For hot insulation, the heat flow through the insulation corresponds to the heat flow from the outer surface of the insulation to the surrounding air. For cold insulation, the heat flow from the environment to the outside of the insulation corresponds to the heat flow through the insulation. 

Insulation Materials and Their Thermal Properties

Thermal properties largely depend on the thermal conductivity of the cell walls and cell-matrix, as well as radiation and convection, with the cell-matrix being the most important factor determining the overall heat transfer properties. Thermal conductivity changes over time due to changes in the composition of the cell-matrix. 

Using the right insulation in construction is critical to the environmental impact of the overall design. Insulation manufacturers regulate their products to meet (basic) energy requirements for thermal insulation of buildings. Like all other building materials, thermal insulation materials are subject to heat transfer theory. Better thermal insulation properties of insulation materials compared to other building materials result mainly from standing air (or gases) encapsulated in the insulation material. 

In thermal insulation of green roofs, for example, the thermal insulation properties of plants are utilised to create an insulation barrier that serves as a windshield, minimises air circulation, and reduces heat loss by convection. Green roof insulation is mainly used to reduce overheating in a building produced during the summer season.

Thermal Conductivity

The best insulation materials should have the lowest thermal conductivity to reduce overall heat transfer. The insulating properties of commercially available insulating materials are determined by the amount of gas contained in the material and the number of gas pockets. Therefore, the greater the number of cells (which can stagnate gas) and the smaller their size, the lower the thermal conductivity of such insulation material.

The heat energy flows through the insulation material through three mechanisms: solid conductivity, gas conductivity and radiation (infrared). The sum of these three components gives the total thermal conductivity of the material. The improvement of the thermal resistance of a building partition can be achieved by reducing the thermal conductivity. 

This mode conducts thermal energy through a solid, liquid or gas from molecule to molecule in the material. For heat to be conductive, there must be physical contact between the particles and some temperature difference. Thermal conductivity is, therefore, a measure of the rate of heat flow from particle to particle. The temperature difference and its thermal conductivity affect Sonatherm thermal acoustic insulation is a seamless, decorative ceiling and wall finish that can be applied to most surfaces or constructions. Contact us for more info!

Spray Foam Insulation Company

BrandXXX is a Spray Foam Insulation company with over XXyears of industry experience. We offer domestic and commercial sprayed foam for walls, floors, roofs and ceilings.