I made a statement in this post that still stands:
https://www.early-retirement.org/forums/f54/tv-antenna-112280.html#post2709422
That statement is I need to move this antenna to the other side of the house. You can see it is pointing to the oblique slop of the roof. Even though the roof is shingle, it is attenuating. On the other side of the house, I can "see" directly through a thin wall. I think it will be better. I just have to go up there and do it. Pain in the neck. As is, this is a good antenna and works well for transmitters about 30 miles away. But I still get those occasional drop outs, especially during weather inversions. It has caused us to watch shows more on Hulu/Paramount/Peacock, which is a habit I want to break.
Can you place your antenna so the view of the transmitters is through a gable, like me? If your roof is all hips (common today), or the gables are in the wrong direction, then you may be SOL.
You got me thinking. When we moved to our current home, I left the OTA attic antenna at the old place, and as a trial, put an older, simple antenna that I kept, in the attic here, as a test. Too marginal, I get a better antenna, and still had to fiddle with direction quite a bit to get some margin on all the channels (I ended up hanging it from a rope that I threw over a cross beam, and another rope so I could point it.
It's been OK, but I wish I had a little more margin - I'm afraid that some change somewhere will create some dropouts. Your post got me thinking, I'm going through the roof, and maybe through at a rather complex angle, going 'sideways' through a section.
I looked at a map again, and realized the attic over the garage (easily accessible, it has plywood flooring in that area) has a straight shot through the wall to the Chicago towers. But that wall is brick (but with a ~ 2'x3' gable vent, kind of Venetian blind style), so I'm not sure it would be any better. This site says that brick and asphalt shingles over plywood have about the same attenuation (-3 dB).
https://otadtv.com/reception/factors/index.html
But of course, everything at these frequencies is very site dependent, trial and error is needed at some point.
Then I also realized that it might be very easy to run a cable out that vent, and I might get away with a small, unobtrusive antenna that might be very easy to mount just outside that vent. Getting it outside would probably make a big difference. At our old place, about the same distance from the Chicago towers, one of those little flat antenna
almost worked when it was inside on the second floor near a window. So getting it outside might do it.
Of course, the motivation isn't that high since it is working for now. But my Six Sigma training is still telling me to increase the margin to avoid future problems. Once an engineer, always an engineer?
-ERD50