What is the primary benefit of a properly installed radiant barrier?

A properly installed radiant barrier primarily functions to reflect radiant heat away from living spaces, significantly reducing attic temperature. This temperature reduction can have a cascading effect on energy costs, especially in hot climates where cooling is necessary. By keeping the attic cooler, it reduces the workload on air conditioning systems, thus leading to lower energy usage and costs over time.

While a radiant barrier indeed contributes to energy efficiency, its primary role is in managing temperature rather than being directly aimed at cost savings. Improving attic temperature does not directly prevent water leakage or enhance the structural durability of the roof; those aspects are typically managed through other means such as proper roofing materials and installation techniques.