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How Radiant Barrier Can Help You In Energy Efficiency

By Martini Hogiri

Radiant Barrier is also known as reflective barriers. They inhibit transfer of heat by thermal radiation. Heat can also be transferred through convection and conduction. But the Radiant Barrier do not protect against such methods of heat transfer.

As a result of their temperature, every material emits energy by thermal radiation. The extent of energy radiation is dependent on the surface temperature and emissivity. Emissivity is directly proportional to the amount of heat radiated at a particular wavelength. Reflectivity is a measure of how much energy is reflected by the material at a particular length.

Emissivity of Radiant Barrier should be low (like 0.1 or less) at those wavelengths at which they are supposed to function. Usually for buildings, the range of wavelength in the mid and the long-infrared spectrum lies between 3-15 micrometers. The value of reflectivity is not fixed for Radiant Barrier. This is because both emissivity and reflectivity don’t add up to one for different wavelengths. Thus, low thermal emissivity can be used to create surfaces that are visibly dark in color .For proper performance; Radiant Barrier should face towards open surfaces like air or vacuum so that there is no radiation.

The method of applying a radiant barrier:

A material was developed by NASA that was reflective, light and made of plastic substrate and was aluminum coated by vapor deposition method which is commonly known as space blanket. The main use of space blanket is to protect astronauts, spacecrafts and equipments from radiation and to retain heat as in space temperature fluctuations are common. As heat transfer in space is possible only through radiation therefore, Radiant Barrier are more effective and useful in space rather than on earth where the heat transfer is also possible through convection and conduction even after deploying Radiant Barrier.

Radiant Barrier can also be deployed for reducing indoor heat loss.

Installation of Radiant Barrier insulation is usually done by two methods-

1. Radiant Barrier Decking

2. Radiant Barrier Attic Foil.

When the sun rays fall directly on the roof, the roof absorbs this solar energy heating the roof sheathing which is radiated downwards in the attic. By placing a radiant barrier in the attic floor the heat is reflected making the top surface cool and simultaneously preventing the heat from entering the rooms. This makes a radiant barrier an effective reflecting device.

The conventional attic insulation and radiant barrier differ from each other. Their functions are similar but their methods of achieving the same differ. A radiant barrier decreases the amount of heat radiated in areas near to it. The conventional attic insulation technique reduces thermal radiation by means of convection. Air is trapped within insulation in this technique. The rating of such a technique is done by R-value. There are no R-values for Radiant Barrier since they depend upon many factors.

The price range of Radiant Barrier differs depending on a lot of factors. It depends on the shape and size as well as the requirements of the person getting them installed. If you wish to incorporate some extra features, you need to shell out some extra money. The price range also differs depending on the age of the hose. Obviously it is low for a new house.

In the end, it would suffice to say that Radiant Barrier is very effective and useful. People prefer them over other means these days. Have a look on radiant barrier reviews before you decide to install it.

Improve your home with radiant barrier. Read radiant barrier reviews before you decide to install.

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Article Citation
MLA Style Citation:
Hogiri, Martini "How Radiant Barrier Can Help You In Energy Efficiency." How Radiant Barrier Can Help You In Energy Efficiency. 22 Aug. 2010. 3 Aug 2014 <>.

APA Style Citation:
Hogiri, M (2010, August 22). How Radiant Barrier Can Help You In Energy Efficiency. Retrieved August 3, 2014, from

Chicago Style Citation:
Hogiri, Martini "How Radiant Barrier Can Help You In Energy Efficiency"

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