by tigerbangs on Wed Dec 02, 2009 10:11 am
Signals are REALLY weak where you are, and the metal roof is going to cut out what little signal there is: you need to mount a fringe-area antenna on the roof, at least 5' above the metal roof, and even then, I would only expect you to be able to see WXII-DT, channel 31, NBC, and WUNL-DT, PBS, channel 32, with your antenna aimed at 130 degrees.
I would use a hugh-gain UHF antenna like a Winegard HD-9032 yagi, or an AntennasDirect XG-91 mounted as recommended, and use a preamp, like a Channel Master Titan 7777 if you find that the signals are still weak after installing the new antenna.