Your TV Fool report indicates that an attic mounted antenna is going to have a difficult time providing reliable reception of the signals that are now on the air. Before the country switched from analog to digital, there may have been enough signal power to receive a snowy picture but now, the type of antenna and correct installation location are critical.
I'd suggest that you consider installing an outdoor antenna such as the
Winegard HD7698P aimed at 205° per your compass.
To understand your situation better, which of these looks most like your existing antenna?
VHF only
Combination UHF/VHF
UHF only