Here is the Federal Antenna Law that says Yes you can install and use a antenna above the roof.
http://www.fcc.gov?guides?over-air-r...n-devices-rule.
Install a Antennas Direct Clear Stream 2 Complete , above the roof and aim the antenna at about 150 degree magnetic compass.
http://www.antennasdirect.com/store/...VHF-Combo.html
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Remove the reflector screen from the CS2V antenna and the CS2V antenna will receive at the front and back of the antenna so as to receive the groups Tv stations/channels to the , north - north/east and south/east.
Here are some roof top antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.antennasdirect.com ,
http://www.amazon.com.
If you choose to install the CS2V in the attic , aim the antenna at about 150 degree magnetic with the reflector screen removed.