Radiant Barrier Information
Understand how radiant barrier works, choose the right material for the assembly, and find the installation and specification resources for your project.
What Is Radiant Barrier?
Learn what radiant barrier does, why at least one of its two reflective faces needs an adjacent air space, and where it fits alongside conventional insulation.
How Radiant Barrier Works
See the difference between radiant, conductive, and convective heat transfer and how a low-emittance surface changes radiant heat flow.
Performance & Savings
Review the project conditions that affect results, including climate, duct location, existing insulation, air space, and installation quality.
CSI Specifications
Access the three-part CSI guide specification with Ra-flect Radiant Barrier as the Basis of Design. A free account is required for downloads.
Perforated vs Non-Perforated
Compare Laser Perforated (LP) and Vapor Barrier (VB) material by vapor behavior, common uses, and installation requirements.
Plan the next step
Use the installation library for project-specific methods, browse common questions, or request a material sample before ordering.
Plan your order
Ready to size your project?
Laser Perforated (LP) is the safer default for most vented attics and breathable assemblies. Choose Vapor Barrier (VB) only when non-perforated vapor control is an intentional part of the design.