Radiant barriers use reflective surfaces that minimize radiant heat gains in homes and buildings by reducing the impact of solar radiation. Radiant barriers can be incorporated into walls and floors, but the most common application is in attics where, in warmer climates, solar radiation can account for as much as 93 percent of heat flow. As the sun strikes the roof’s surface, the temperature of the roof materials increases. Heat conducts from the hot roof materials through the roof panels and can radiate into the attic and internal building surfaces, warming the interior of the home.
Radiant barrier sheathing panels are engineered wood panels with a thin layer of highly-reflective aluminum facing that reduces radiant heat gain into the attic. The result is a cooler attic, which can equate to lower utility bills, improved energy efficiency and a more comfortable indoor environment. To learn more about APA member radiant barrier products, click a link below. Additional information is also available from the Reflective Insulation Manufacturers Association International (RIMA-I).
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Refer to individual manufacturers' publications and recommendations.
For additional publications on energy efficient construction and radiant barriers, visit APA's Resource Library.