For smaller rooms with good HVAC ventilation for fresh air, EMF reduction can be achieved with removable clamping ZipWall/FastCap poles to support grounded aluminum radiant barrier on walls, roof & floor. E.g. Attic Foil has white vinyl on one side and conductive foil on the other side, about $0.25/sq ft. Matching tape for joints.
To frame the shielded room-within-a-room, cheaper alternatives to ZipWall/FastCap are PVC furniture pipe, electric metallic tube (EMT) conduit or 2x4 pine.
Doorway can be shielded with radiant barrier and RE-U-ZIP magnetic entry strip for a reclosable opening. Bonus side effect is thermal insulation.
To frame the shielded room-within-a-room, cheaper alternatives to ZipWall/FastCap are PVC furniture pipe, electric metallic tube (EMT) conduit or 2x4 pine. Doorway can be shielded with radiant barrier and RE-U-ZIP magnetic entry strip for a reclosable opening. Bonus side effect is thermal insulation.
Transparent RF shielding for windows is more expensive ($4/sq ft), https://safelivingtechnologies.com/signal-protect/.
Use air quality and EMF meters to validate the design and monitor ongoing effectiveness.