Above the roof install a , Antennas Direct Clear Stream 2 Complete VHF/UHF Antenna with a Antennas Direct CPA-19 preamp , aimed at about 115 degree magnetic compass direction.
http://www.antennasdirect.com/store/...VHF-Combo.html.
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.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Remove the Reflector Screen from the Clear Stream 2 Complete VHF/UHF Antenna.
With the reflector screen removed the CS2 Complete will receive Tv stations/channels to the , north west , west , east.
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.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.amazon.com.
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As always , trees and tree leaves do a real fine job of , reflecting , reducing , blocking Tv reception and so do buildings and other obstructions.
Install/mount the antenna in such a manner that there is the least amount or no amount of obstructions in the way of reception.