The digital tv transmissions are Very Weak at your location. Putting a antenna in the attic Will make them Unreliable and Non Receivable. So for reliable and dependable reception , install a Winegard HD7698P antenna with a Winegard AP8700 preamp , above the roof , aimed at about 340 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. . With the HD7698P antenna above the roof , Way too many digital tv stations/channels will be received. Here are some Strong and Sturdy antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com. Here are some places to buy antennas and etc. ,
http://www.winegarddirect.com ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.starkelectronic.com ,
http://www.3starinc.com