Save Your Money With Energy Efficient Home Improvements
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.
Through thermal radiation, energy is emitted by every material and the extent of which depends on surface temperature and the relative ability of the material to emit radiation which in turn is directly proportional to heat radiated at particular wavelengths. At these given wavelengths, the amount of energy that a material reflects measures the Reflectivity of that material.
Radiant Barrier should have a low emissivity (0.1 or less) at wavelengths that they are supposed to function. The range of wavelength in the middle and long infrared spectrum for the buildings is between 3-15 micrometers. As far as Radiant Barrier is concerned, their reflectivity is not fixed. This is for the reason that reflectivity and emissivity do not add up as one for different wavelengths. The property of low emissivity is used to create surfaces that have a dark appearance. If radiation is not desired, the direction of the radiant surfaces should be towards open surfaces like air or vacuum.
Uses of Radiant Barrier
NASA came up with a material that was light, reflective and made up of a plastic substrate that had a vapor deposited coating of aluminum. This is popularly known by the name space blanket. It is used for protection of equipments, astronauts and spacecraft from radiation and also for the retention of heat as temperature fluctuations are a common thing in space. Radiant Barrier is more effective in space than on earth because heat transfer in space only takes by radiation. The heat transfer on earth can take place by conduction and convection even if Radiant Barrier is deployed.
To stop heat loss indoors, Radiant Barrier can be used effectively.
There are two methods to install Radiant Barrier insulation given as follows:
1. Radiant Barrier Decking
2. Radiant Barrier Attic Foil.
The roof of a building absorbs solar energy on sunny days and this heat is radiated downwards to the floor. If a radian barrier is placed on the floor, it reflects the heat it receives back to the roof again. This causes the surface to remain cooler. It also reduces the amount of heat coming into the rooms and hence is quite an effective device.
The traditional method of insulating an attic and a radiant barrier are different from each other. Despite having the same objective, the two differ in the methods of doing so. The areas near a radiant barrier are cooler as it reduces the heat radiated whereas the traditional method of attic insulation achieves this by means of convection. This technique utilizes air trapping. R-value is the scale which rates this technique. Radiant Barrier has no R-values as they depend on a lot of factors.
Radiant Barrier comes in different ranges. The cost primarily depends upon the one who is installing it. Other factors include the extra features which some people like to incorporate in it. The price is different for a new house and an existing one.
It can be concluded that Radiant Barrier very effective, carry vital importance and desired by all. Have a look on radiant barrier reviews before you decide to install it.
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