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What is Thermal Insulation?

Thermal insulation is defined as the reduction of heat transfer or as a method of preventing heat from escaping or entering an object. It helps in maintaining a certain temperature in a particular area.

Thermal insulation seeks to reduce the heat flow between two objects or areas of different temperatures. The property of a material to withstand heat flow is known as thermal resistivity (r). This is a reciprocal of thermal conductivity (k or which is the property of the material to conduct heat.

Measurement:

Thermal resistivity is measured in m.K/W in SI units and multiplying this with the thickness of the material gives us the thermal resistance R in m2.K/W. Adding all the thermal resistances for a particular barrier i.e. wall, roof or floor and taking its reciprocal gives us the U value known as thermal transmittance.

Need for Thermal Insulation

  • Reduce heat loss or heat gain from the external environment.
  • Enhance the comfort of building occupants.
  • Enhance the comfort of building occupants.
  • Increase efficiency of heating, cooling, ventilation and other systems.
  • Save energy by reducing power consumption thereby also protecting the environment.
  • Increasing the lifespan of certain structural elements such as roofs, waterproofing systems and facades.
  • Prevent or reduce condensation on surfaces.