AVS Special Member
Join Date: Jul 2001
Location: Historic College Park In Lake Worth, FL, USA
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Your assumption that the trees are the problem may not be correct.
The so-called "stealth" antennas like the Terk 55, for example, are equally sensitive to signals arriving from the front and from the rear. They seldom provide satisfactory performance. If you aim one side of it in the direction from which a desired signal eminates the antenna will be equally sensitive to reflected signals bouncing off objects behind it, from which multipath reception will arise.
Go with a directional antenna. You don't mention where you are located so I can't make a specific recommendation but basically you would be best served by a conventional, directional outdoor antenna.
Re: attic reception, the building materials will attenuate the signal level somewhat but so long as it remains above your receiver's threshold you can get good reception. Beware metal roofs, though. Really thick trees in close proximity to the antenna can adversely affect reception, particularly when wet and especially at higher frequencies like UHF. Again, receiver threshold is an issue.
WPTV/WFLX West Palm Beach, FL