Why Does Radiant Barrier Work?

What makes radiant barrier foil so effective in reducing energy bills in the summer? Radiant barriers work by blocking radiant heat from being absorbed into our homes, garages, barns, etc. resulting in a more comfortable and energy efficient space.

In theory, if all of our homes were under the shade of a tree, we wouldn't need radiant barriers. Since that is not the case, radiant barrier foil is the next best thing to naturally occurring shade. Simply put: radiant barriers reduce the amount of heat entering the home/building. Reducing the amount of heat gain helps to reduce the energy needed to remove the heat (air conditioning) and makes the living space more comfortable.

Video: How Radiant Barrier Works
In theory, if all of our homes were under the shade of a tree, we wouldn't need radiant barriers. Since that is not the case, radiant barrier foil is the next best thing to naturally occurring shade. Simply put: radiant barriers reduce the amount of heat entering the home/building. Reducing the amount of heat gain helps to reduce the energy needed to remove the heat (air conditioning) and makes the living space more comfortable.