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.
Our Leaf and Curve antennas are not waterproof or weather resistant so using them in a location that would expose them to the elements would cause the antenna to fail.
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 antenna.
Bottom Image: antenna used outdoors.