[ADTech]

- foiled faced OSB for roof sheeting

Forget the attic unless there's another path of signal ingress. Radio signals do not pass through metal.

- brick and stone veneer

Depends on what's behind the masonry materials. If there's any metal lathe there, signals will not penetrate the walls, perhaps the windows will admit some signal (depends on whether low-E glass or wire screens are involved).

I assume I can easily pull in the Charlotte stations

Depends on what's in that direction. If you have a clear view, it should be easy. If not, then it may not be so easy.

but why go bigger/more elaborate

"Bigger" usually means more directional which can complicate reception of scattered broadcast towers making a rotor necessary. Rotors have the potential to open several other cans of worms.