Here is a list of the receivable Digital Tv stations/channels with one antenna aimed in one direction outside above the roof antenna.
In the order of strongest to weakest signal strengths.
WTZT-DT , REAL VHF channel 11 , virtual number (11.1) RTV Retro Tv Network.
WHIQ-DT , REAL UHF channel 24 , virtual number (25.1-2-3) PBS and PBS World , PBS Create.
WAFF-DT , REAL UHF channel 49 , virtual number (48.1-2) NBC and Bounce.
WAAY-DT , REAL UHF channel 32 , virtual number (31.1) ABC.
WZDX , REAL UHF channel 41 , virtual number (54.1-2-3) FOX and MyTvNetwork and Me-Tv.
WHNT-DT , REAL UHF channel 19 , virtual number (19.1-2) CBS and Bounce.
WHDF-DT , REAL UHF channel 14 , virtual number (15.1) The CW.
I recommend install a Winegard HD7696P antenna above the roof in such a manner that the roof and house is not blocking reception to the , north west and north.
Aim the HD7696P antenna at about 340 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Install a Winegard AP8700 preamp.
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For 1 Tv connected use no splitter.
For 2 Tv's connected use a , HFS-2D , 2 way splitter.
For 3 Tv's connected use a , HFS-3D , 3 way splitter.
Buy the HFS splitters at ,
http://www.hollandelectronics.com , or ,
http://www.solidsignal.com.
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Here are some above the roof antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim ,
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.winegarddirect.com.
Here is the Federal Antenna Law that says Yes you can install antennas above the roof.
http://www.fcc.gov/mb/facts/otard.html.