Radiant Barrier

Description
Tin foil on steroids. Originally called Multi-Layer Insulation by NASA who invented it for the Apollo missions, it is typically 2 sheets of foil with a scrim in between. They reflect radiant energy. Sunlight is the best example of radiant energy, campfires are another example. Our bodies also produce a lot of radiant energy which is why emergency road kits often include a foil blanket.

Pros

  • Reflects 97-98% of radiant energy.
  • High fire rating, so it can be left exposed in many areas.
  • Inexpensive option for covering fiberglass in knee walls and attics.
  • Great to use with radiant floors.

Con

  • Not very effective in cold climates.
  • Need an open air space on each side to reach its full R-value.

Quicklinks:

Cellulose
ThermoFoam
Fiberglass
Radiant Barrier
Rock Wool
Air Krete
Open Cell Foam
Closed Cell Foam