a steel roof with steel sided walls works great, unless you have a window. I have a barn with a room in it with no windows and no cell phone can receive in it....put your cell phones in a micro wave oven and they work fine...glass lets the waves through...
making a sleeping place safe can be done, but forget the entire home, unless your home is underground.....some years back they sold sleeping chambers that you floated on top of 1,000 pounds of epsoms salts and water...I assume when that door came close the chamber would be anti frequency since it has no windows, etc...and you sleep in total 100% darkness floating on salt.