Attics produce Multi-Path , multi-path is what you do not want for the following recommendation.
Directional antennas receive the least amount of signal directly on the sides of the antenna.
Install 2 Channel Master , CM4228HD antennas above the Peak of the Roof.
Aim 1 CM4228HD antenna at the , South West South group of Tv stations and keep the side (edge) of the antenna to the , North West group of Tv stations.
Aim the other CM4228HD at the , North West group of Tv stations and keep the side (edge) of the antenna to the , South West South , group of Tv stations.
To further isolate the antennas ( cross talk) connect the antennas to a , Winegard CC7870 , transformer type isolation coupler combiner.
http://www.winegarddirect.com/viewit...7870)&p=CC7870
1 coax goes from the CC7870 coupler to the Tv.