At the time the house was built, aluminum wiring was the standard. Years later, it was discovered that this was a big fire hazard. With the help of an electrician friend who was willing to work for booze, we slowly but surely replaced every inch of aluminum wiring with copper. There was an incredible amount of sheetrock work to do after cutting access holes to run the new wiring. We also replaced the meter panel, load center, and added a gen panel and inlet.