I have just went through the research and cutting the cord in the past 2-3 months in the Atlanta area. I live in the northern suburbs and have Atlanta towers 18-22 miles away and few more coming from the Kennesaw, Stone Mountain and the Athens areas.
I have started my OTA journey with the Mohu Curve 50 indoor antenna and was able to pick up most if the channels in UHF but had problems with Hi-VHF where PBS is. Then I’ve got another indoor antenna to try - Clear Stream Eclipse TV Antenna, turned out to be even worse than Mohu for my location.
Then, I started thinking along the attic/outdoor antenna, same as you.
I have found previously linked article in this thread about the DISH installing antennas, called them and, for a prepaid $150 you can get their directional antenna installed and routed to a single outlet. They said that they only have directional antennas to install and that the only way to claim prepaid money back would be if they couldn’t give you the main Atlanta channels
Antennaweb and tvfool were showing 360 degrees possibility at my location and, with the upcoming repack in August 2019, I really wanted as much of a future-proof solution as possible. So, I did a little more reading about the omni-directional antennas, but also have contacted a few TV antenna installers I could find in the Atlanta area.
These companies can be divided into a few niches. First are true antenna fanatics (in a good sense), they will do everything to maximize the reception in your location. Atlanta Digital TV of Marietta is o e fine example of this kind of company. I was told that Atlanta market is better suited for a directional antenna and felt that the guy is really comfortable with the antennas and signals, but was trying to avoid major cabling work at all costs (I wanted to have an option of keeping my current cable internet and existing wiring - you are not supposed to put both cable and OTA signals on the same cable run.
Then, there were a bunch if companies that install flat TV’s on the wall and hide wires. Vital Link TV Solutions replied to my Thumbtack inquiry with some answers/solutions, but they are basically Channel Master reseller and I wasn’t sure how are they when it comes to the DTV antenna signals.
Meanwhile, I have decided to try an Antop UFO 720 attic/outdoor antenna. It did very well indoors, better than the other 2 antennas I’ve tried earlier and one day I took it to the backyard and just positioned it on top of my grill and it scanned 100+ channels, some of them duplicate from the other towers!!!
Wow, if I can find most if the channels in the backyard, imagine what will I receive when it is mounted higher?!?
Then, I read that you can just hire a cable/electrician guy, which is what I have decided to go with, my other option was to hire DISH guys for $150 and just ask them to use my antenna instead of theirs.
Found cabling guy on Thumbtack, who did an excellent work for $175 plus some material, like a mounting rod and a decent surge protector.
We did decide to mount it on the chimney from the backyard side, but raised to have 360 visibility. Some directions are obstructed by my house and neighbor houses, but I’m getting a very good signal on the most of the HD channels.
Would this work better overall than an attic mount? Maybe. For me, the decision to place it on the chimney was because of the easier cabling, used existing Comcast external box to install a grounded surge protector and it made easier drilling into my living room to install a nice wall plate for antenna TV.
Also, some articles suggested that an average roof alone would cut 20% of the signal right away.
Have I made the right choice? Time will tell. Everything comes in crisp on my Table, but one of the NBC shows recently complained it couldn’t do commercial skip due to qualify of the signal, hopefully just an abberation (fingers crossed).