What is reflective insulation (a radiant barrier)?
Reflective insulation, or a radiant barrier, is a metallic foil material (usually aluminum) designed to block radiant heat transfer across open spaces. Reflective insulation is most effective at reducing cooling bills in hot, sunny climates. However, in some cases the product can help reduce heating bills as well. The effectiveness of the product will vary depending on the direction of heat flow (up, down, sideways). The performance and long-term cost-effectiveness of the product depends on where the product is installed, how the product is installed, and the amount of existing insulation currently in the home.
