How should a radiant heat barrier be installed according to best practices?

The optimal installation of a radiant heat barrier is to place it on the rafters or utilize perforated materials. This method ensures that the barrier effectively reflects radiant heat, particularly in attics, while allowing the necessary airflow through the perforations. Installing the barrier on the rafters helps to minimize heat transfer into the living space, contributing to energy efficiency by keeping structures cooler in warm weather.

Alternatively, placing a barrier directly on insulation or ceiling finishes could hinder airflow and moisture management, which can lead to issues like condensation and reduced insulation effectiveness. Similarly, laying the barrier under floor panels may not provide the intended benefits of reflecting heat away from living areas, thereby diminishing its overall efficacy. Therefore, using rafters or perforated materials aligns with best practices for maximizing the performance of a radiant heat barrier in a home improvement context.