The following is a Teleview recommendation for broadcast Tv reception.
Here is the Federal Antenna Law that says a broadcast Tv antenna of any size , even big ones can be , installed , used , maintained.
http://www.fcc.gov/mb/facts/otard.html.
That said , a Small Antenna will work very well at your location.
Above the roof install a ANT751 antenna with no preamp aimed at about 327 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
At solidsignal the ANT751 antenna is available with a J type antenna mount for , Low dollars.
Mount/install the ANT751 above the roof in such a manner that antenna clears the roof.
For 1 Tv connected use no splitter , no amplifier.
For 2 Tv's connected use a common simple 2 way splitter , no amplifier.
The Many receivable Digital Tv stations/channels are to the , north west , west , south , south east.
The Digital Broadcast Tv stations/channels in the , Green , Yellow , and into the Red zone will be received.
As always , trees and tree leaves do a real fine job of reducing or blocking Tv reception and so do buildings and other obstructions.
It is a best to mount/install the ANT751 antenna at a location that has the least amount to no amount of obstructions to the , north west , west , south , south east.
The Tv/s Must Channel Scan for the Digital Broadcast Tv Channels , sometimes named the 'Air Channels' or 'Antenna Channels' in the Tv setup menu because the the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT channel scan for cable tv channels.
Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com.