We built a home in 2003 and used Sherwin Williams E-Barrier Reflective Coating in our attic.  The house is

3,500 sq. ft. and I am not sure what we are saving, because we don't have anything to compare it to.  Has

anyone ever used this product on an existing home and is it more energy efficient?  Here is more detail on the

product:

• In summer, E-Barrier reflects radiant energy from the sun
• In winter, E-Barrier prevents radiant energy from leaving the building
• Reduces heating and cooling costs by as much as 15 percent (independent testing laboratory certified)
• Low emissivity (e-rating)
• Breathable coating, won't trap moisture
• Fast, one-coat coverage with minimal overspray