- Reflective Insulation - Reflective insulation is a combination of insulation, radiant barrier, and vapor barrier all in one. It has a rating of R-15.67, blocks 97% of the radiant heat, and serves as a vapor barrier. This all inclusive
application is equivalent to installing 4" of blown in insulation and spraying radiant barrier under the roof system. This product is ideal for homes that have sufficient access to the roof system.