>>10053152OP, keep in mind that to fully shield yourself, you need to make a Faraday Cage. this means the entire room must be insulated, not just the walls. this means ceiling and floor also. 5g is omni-directional, it is literally designed to be able to penetrate walls so you have service in buildings, even underground, etc.
there is also a very, and i mean VERY expensive, wall coating that movie theaters started using a few years ago that is quite literally an EMF/RF blocking paint. it's known as Shielding Solutions EMF Shielding Paint YSHIELD, and its about $300 a bucket. if you want to seriously block your shit, that would be the way to go.