The Antenna Craft HD850 is a good antenna for reception at your location.
Aim the HD850 at about 113 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here is a chimney antenna mount that extendes out further out from the side of the chimney.
Ronard # 4424 Commercial chimney mount.
http://www.ronard.com.
Use a larger diameter heavier guage mast antenna pipe.
Mast antenna pipe is ridiged and does not flex.
______________________
Recommend Test reception with a 8 way splitter first.
Can install a Channel Master CM3418 , 8 way distribution amplifier later if required.
_____
To keep , Weather / Water , out of outside connections , use Compression type connectors on the ends of coax.
Use coax that has Compression type connector on the ends of coax.
Remove and Discard Rubber weather boots.
Rubber weather boots take in and hold water inside the boot , this is not good for connections.
To make double sure , weather / water , does not get into outside connections , wrap with
http://www.coaxseal.com.
____________________________
Here are some places to buy antennas and etc. .
http://www.soldsignal.com.
http://www.amazon.com.
http://www.antennacraft.net.
http://www.channelmasterstore.com.