I rented a place where the walls were lined with chicken wire. They used it to hold the plaster to the lath. I ended up needing to run a POE wifi AP to each room.
When I moved out I told the landlord that he should use it as a selling point, as some people in the area had just tried (and failed) to sue the library for not respecting their wifi allergy.
It was built by a german chemicals company and the reinforced concrete blocks signals.