Several years ago one of our TSCM clients had us create two secure conference rooms. No RF could get in or out. On the surface the thought of creating a secure screen wrap under the carpets, behind the sheet rock and in the ceiling seemed plausible by the client until we explained the RF would travel up each of the sheetrock nails, and all the electrical wiring. Eventually we made it happen, but it was a lot more involved than making a simple screenroom.
