I have given you my best shot at recommendation for Reliable Reception at your location.
The preamplifier I have recommended is a High Gain preamplifier.
Most likely , Fox , CW , ION , will not be received with antenna in the attic.
There Are No - Magic Tv Antennas , There Are No - Magic Tv Antenna System Amplifiers.
The -->Only Way<-- to know for sure , is put the HD7082P antenna in the attic.
---->As always you are 100% Free to do any type or kind of antenna installation<----.
You can listen to and follow your own advice , You can listen to and follow other peoples advice.
One other advisor has provided a recommendation.
There are other advisors here at tvfool , perhaps they can provide a recommendation and solution.
At some point You will take Action on What You Know.
Here is the Federal Antenna Law that says Yes you can Install a Broadcast Tv antenna Above The Roof , so as to have Reliable Reception.
http://www.fcc.gov/mb/facts/otard.html.
Please report on your installation and reception experience so that others can gain knowledge.