Comment by knicholes
4 years ago
I recently cut a couple holes in my house exterior through stucco. Like a sibling comment, that stucco was secured over some wire mesh. I can't remember how dense the mesh needs to be to block whichever frequencies would be used, but something like that would be commonplace and provide reasonable doubt.
There are different types of lathe used for plaster walls.
From chicken wire to mesh with 1/8, or less, inch rectangles.
I imagine the whole room would have to be covered with lathe. In good construction the lathe is covering every sq. inch of a room before the the base coat is put on.
Plaster wall are not typical anymore. Stucco is still used on exterior walls, but it usually just covers up ap the foundation, and might extent up the wall a few feet.
Plaster walls in a bathroom are the best walls though. The house I'm in has 1" thick plaster walls, and they hold up to a lot of abuse.
A well plastered plaster room would need screen on the door too, but that's doable.
If I was building a house, it would have stucco walls. Maybe only the exterior walls, and the ceilings? Then my signals could go room to room, but the world is locked out.
No one uses chicken wire, but it works just as well as the new smaller holed lathe sheets.
I still have no clue if modern sheets of lathe would act as a Faraday Cage?
I have fooled around with Faraday Cages, and tiny openings matter.
(I remember hearing about a guy who stole a vechicle with lowjack. He covered the vechicle with chicken wire, and the cell signal with through? He was caught.)