What is a Radiant Barrier?
A radiant barrier is a radiant heat reflective insulation material that is installed to the underside of the rafters in your attic. These highly reflective barriers reflect heat rather than absorbing it. A radiant barrier’s effectiveness depends on proper installation, so it’s best to use one of Service One’s certified installers.
How Does a Radiant Barrier Work?
According to Energy.gov, when the sun heats a roof, it’s primarily the sun’s radiant energy that makes the roof hot. Much of this heat travels by conduction through the roofing materials to the attic side of the roof. The hot roof material then radiates its gained heat energy onto the cooler attic surfaces, including the air ducts and the attic floor. A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic.
A radiant barrier works best when it is perpendicular to the radiant energy striking it. Also, the greater the temperatures difference between the sides of the radiant barrier material, the greater the benefits a radiant barrier can offer.
Why Do I Need Insulation Too?
The reflective materials of a radiant barrier are used to reflect radiant heat to lower the amount of heat being absorbed into your attic space. It does not; however reduce heat conduction like that of thermal insulation materials. Regular attic insulation is used to create a barrier of still air to prevent air flow needed for convection, all while acting as a physical barrier to conduction.
Together a radiant barrier with a properly insulated attic can reduce your energy usage and give your air conditioner a much needed break during those hot Texas summer days.