If you read back in other posts you will find that I ask about Metal Roof over and over and over again. I know this about many question askers , they will leave out what is important and talk about what is not important. It's because the world we live in now the important is , THE IMAGE , THE EGO , THE ATTITUDE. . I despise , image , ego , attitude , tells me the person is out of touch with reality and is crazy. Tv antennas are not Tv antennas because they are cool. Tv antennas are Tv antennas so as to Receive Tv signals so you can watch Tv. READ AND UNDERSTAND THE INFORMATION IN THESE LINKS.
http://forum.tvfool.com/showthread.php?t=233 ,
http://forum.tvfool.com/showthread.php?t=695 ,
http://www.kyes.com/antenna/pointing/pointing.html