Open-celled spray-in foam insulation is by far superior to a traditional radiant barrier which is a foil-like thing that you can either tack to the rafters or lay on the floor of your attic.
Are Radiant Barriers Worth It?
▶Reflective Insulation Core Foam◀ Double-layer aluminum foil closed-cell foam is a lightweight and durable, non-toxic, non-carcinogenic, waterproof,
Halero 5mm Reflective Insulation Foam Core Radiant Barrier 40“ × 80” Double Side Foil Cold and Heat Shield Thermal Insulation for Ceilings,Walls,Steel
Radiant Barrier, Fiberglass Insulation, Insulation Installers
SmartSHIELD -1.5mm Reflective Insulation roll, Foam Core Radiant
One layer closed-cell foam bonded between two layers of highly reflective metalized aluminum polyester film. Industrialized strength, lightweight yet
US Energy Products (3MM Reflective Foam Insulation Shield, Heat Shield, Thermal Insulation Shield Radiant Barrier 24 x 10ft 20sqft
Radiant Barriers Houston Roofing Contractors Blog in Houston, TX
Understanding Spray Foam Insulation - Attic Insulation Houston
SmartShield -3mm 48x50ft Reflective Insulation Roll, Foam Core Radiant Barrier, Thermal Insulation Shield, Commercial Grade - Pure Aluminum
Radiant Barrier Insulation in Rochester, Ithaca, Syracuse
AtticFoil™ vs. Other Products - AtticFoil™ Radiant Barrier - Do-It
Combining Radiant Barrier with Spray Foam Insulation on a Roof
24 x 25' -5W WHITE Reflective Insulation roll Foam Core Radiant
Best Install Method - AtticFoil™ Radiant Barrier - Do-It-Yourself
Garage Door Insulation: The Ultimate Guide