You joke, but I really was yesterday. I barly had enough leakage to get the wireless to work.
No joke. Back in the seventies, when I converted this building from a garage to a studio, I wrapped the entire thing in space blankets, to reduce heat loss, then put foam insulation and siding over that. Inside the block walls, I installed studs and foil-backed fiberglass. It worked great. The TV heats the entire building, most of the time.
Then they invented the cell phone... ooops.