Here is the Federal Antenna Law that says Yes you can , install , use , maintain , antennas above the roof of the house. And can be installed up to 12 feet above the highest part of the roof. However like I say , 25 feet or so to begin with.
http://www.fcc.gov/mb/facts/otard.html.
Install the CM2018 antenna above the roof with the Kitz Tech , high gain , Ultra low noise amplifier.
I think you will be suprized by what is received and a better antenna such the HD7084P antenna will do even better.
The Tv transmissions are very weak at your location , so a high gain amplifier is required.
And the Kitz Tech amplifier is Ultra Low Noise. All electronic circuits generate electric/electronic noise. The noise 'masks' the signal , so less noise means more usable signal. The Kitz Tech amplifier has the least amount of noise , compared to , Antennas Direct , Winegard , Channel Master and etc.