Above the Peak of the roof in such a manner that reception is not blocked in all directions by the roof and house , Install a Winegard HD7000R antenna aimed at about 268 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are some above the roof antenna mounts.
http://www.ronard.com/909911.html , Use the 5 foot tripod antenna mount.
http://www.ronard.com/34424560.html , use the #4560 eave antenna mount.
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 or buy from ronard.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.winegarddirect.com.
As a Test to Prove Reception , connect a NEW loooong coax to the matching transformer (balun) that connects to the HD7000R antenna , and run the NEW loooong coax through a open door or window , Direct to the New Tv and connect to the Tv.
No couplers , No ground blocks , No splitters , No DVR's , No VCRs , No Tivo's , No cable boxes , No satellite receivers , No nothing.
It is the , Antenna , Matching transformer , Coax , Tv.
The Tv Must Channel Scan for the Digital Broadcast Tv Channels , often named the , 'Air Channels' or 'Antenna Channels' , in the Tv Setup Menu because the , OTA= Over The Air , Digital Broadcast Tv Transmissions travel through the Air from the transmitting antenna to the receiving antenna.
Some Digital Tv's will automatic channel scan for cable tv channels.
DO NOT channel scan for cable tv channels.
Go into the Digital Tv Setup Menu and select , 'Air Channels' / 'Antenna Channels'.
What is reception like now??