We had similar problem in the housing industry a few years back. One of the home builders was using a sheeting on the outside of the house that had a thin layer of material that looked like aluminum foil. Some type of thermo barrier. Then the vinyl siding was nailed on top. The siding guys were using 1 1/2" and sometimes 2" nails and the nail would penetrate the romex and electrify the skin of the sheeting, the down spouts and I had 88 volts to ground on one of the brick fronts of a house. The guy doing the pressure washing kept complaining that he was getting shocked and was smart enough or lucky enough to get away from the house. As a result I haven't seen any of this type of sheeting being used since.
