Also, expect to have very strange windows. Of course, if visible light can pass through, that might be considered a flaw in your faraday cage so YMMV.

Personally, I'd like it if my devices knew what room I was in. Back in 2013, I'd started working on a home automation project with that goal in mind, but then all these closed source devices came out that were incredibly cheap and convenient and I haven't revisited the idea since.

I do look back with a bit of regret that more hasn't been done to push for reverse engineering these devices or somehow encouraging companies to open source their routers to support third-party operating systems, etc. We take for granted that we've open source smartphones and standard PC specifications when we don't yet have a standard that could let me run YouTube TV on my Echo Show 8, for example, or add lossless FLAC playback to my smart speaker...

I imagine window screen mesh connected electrically to the rest of your grid should work sufficiently (like the mesh on the microwave window)

>Also, expect to have very strange windows.

I have screens on my windows so I can have them open yet not have bugs wandering in and out - just pick wire mesh and ground it. Done!

You could just put antennae outside the walls like many houses/cars do.