you can add aluminum chips to your paint and it will block the RF radiation, there's also fabric you can buy to turn into curtains that also block the RF signals. There were articles talking about this popping up around 2009 mainly geared towards blocking others from hijacking your wifi signal. then suddenly there was a CP bust, which they found they arrested was innocent and the guys neighbor was using his unprotected wifi password to spread CP. From there the media went big on password protecting your wifi signal, which no one cared about passwords when people were stealing credit card info. https://www.emrss.com/collections/emf-shielding-paint there's paints, fabrics, and adding aluminum chips to paint all work. https://www.homedepot.com/p/WOREMOR-RF-IE50-Radio-Frequency-5G-and-EMF-Shielding-Paint-1L-RF-IE50-1L/317437519 https://www.youtube.com/watch?v=fhxjzbxmDxA&ab_channel=HighlineGuitars This guy painted the exterior of his house in RF paint before siding it. https://www.youtube.com/watch?v=cCQAD_ucGvQ&ab_channel=UrbanFarmerCurtisStone