The only antenna that we make that is specifically for outdoor use is the Sky 60. Our Leaf and Curve antennas not designed to be exposed to the elements in any capacity. They are not waterproof or weather resistant and if used in such a way that they were exposed to the elements this would void any warranty.
They are also not made to withstand the heat and humidity that can occur in an attic. Using in an attic will cause the Leaf antenna to curl and will ultimately ruin the reception. Using any Leaf or Curve antenna in a location other than in a normal climate controlled indoor setting may void the warranty.