A Texas scientist talks about heat transfer, radiant heat barriers, and the how aluminum barriers can be bad news if it is not a Energy Improvement Radiant Barrier. Cheap aluminum barriers will oxidize in a few short months or years, then it will actually conduct heat. The radiant barrier has to be specially treated to prevent oxidation. The more humid a climate the quicker the degradation of the product. Energy Improvements products are made in a special way to prevent any problems, and the products are guaranteed with a double lifetime warranty. If and when the home is sold the warranty transfers to the next homeowner. The product can also be willed over to another family member.