Radiant barriers are sometimes referred to as "reflective insulation" and "radiant barrier insulation" because, like insulation, they can effectively slow the transfer of heat. Good insulating materials like foam and cellulose force heat to move slowly. A radiant barrier works differently, actually reflecting heat energy back towards its source.
Before
This is the attic before we made it energy efficient.
Support Beams and SuperAttic
A shot of the radiant barrier installed with support beams.
Radiant Barrier
A radiant barrier was installed to keep this home warmer in the cold weather and cooler in hot weather.