Installation Guide:
Residential Applications - Wood Framing
Typical Retrofit for Roof Installation
Product
Foil Double Bubble Foil
 
In this application the Flexfoil is installed as a radiant barrier. An R-Value cannot be assigned to the material in this system as it is not a closed system. However, due to the low emittance of foil surfaces
(emittance of 0.03), the Flexfoil does not absorb and re-emit a large amount of radiant energy. This translates into significantly increased comfort levels and energy savings.

 
Instructions
  1. Measure working area where Flexfoil will be applied.
  2. Fasten the Flexfoil to the bottom of the rafter facing using 1/2" staples every 4" - 6".
  3. Ensure that all seams are securely taped using Flexfoil reflective tape.
  4. Leave approximately 2" free of material at the eaves and soffit/ridge vent to ensure that good ventilation is maintained.