As always , attics and the inside of buildings Are Not a reception friendly environment and Never Will Be a reception friendly environment.
Multi-path/reflections signals bouncing all around , absorbing , blocking , Broadcast Tv reception.
The following is a - Non Complete - list of building construction that reduces and blocks Broadcast Tv reception with a Tv antenna.
Metal Roofs do a Excellent job of Blocking Broadcast Tv Reception.
Stucko , Wire , does a Excellent job of Blocking Broadcast Tv reception.
Metal backed insulation does a Excellent job of Reducing Broadcast Tv reception.
Concrete tile shingles do a good job of Reducing Broadcast Tv reception.
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Start with Channel Master CM4228HD antenna in the attic aimed at about 197 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
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A antenna system amplifier is not required.
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For 1 Tv connected use No splitter.
For 2 Tv's connected use a simple common 2 way splitter.
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If there are reception issues that are not resolvable by adjusting the antenna aim and location of the CM4228HD antenna in the attic.
Move and install the CM4228HD antenna Above The Peak of the Roof in such a manner that the roof and cabin are not blocking reception to the south west at about 197 degree magnetic compass direction.
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A Winegard DS3000 , J pipe antenna mount will work Ok for mounting/installing the CM4228HD antenna.
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ronard (4560) eave antenna mount.
Or a.
ronard (2212) , ronard (2218) , ronard (2224) , chimney antenna mount.
Buy the ronard antenna mounts at
http://www.solidsignal.com , or ,
http://www.ronard.com.
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Disconnect and Remove ALL satellite system passive and active components such as and not limited to , multi-plexers , multi-switches , combiners , splitters , amplifiers , power injectors , power supplies , and etc. .
Yes the satellite system coaxes and other coaxes can be used for the antenna system.
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Here are some places to buy antennas and etc. .
http://www.solidsignal.com.
http://www.amazon.com.
http://www.channelmasterstore.com.
http://www.winegarddirect.com.