I have some locations where low voltage lines are closer to line voltage lines than I would like. In most of these cases I didn’t want to push the low voltage towards the outer wall so as to not risk a nail coming in during exterior material buildout. The CAT6A lines are shielded, but the low voltage security and speaker wires are not…

I added some foil in some locations, but the effectiveness of the faraday shield is reliant on it being significantly thicker than the skin depth for that material at the frequency of interest. For aluminum and 60Hz, that is about 1cm… and aluminum foil is about 0.016mm thick… so it is really only a good shield for >100Mhz.