I was shocked to find out that our home had aluminum siding under the vinyl siding. I thought you would have to remove the aluminum siding before you put the vinyl siding on. So, I called a Chicago siding company and they came out and looked at my house to see if they could tell me why it would have been installed that way. When they first looked at it, they shook their head and were not sure how they accomplished this feat. They were not sure if we should remove the vinyl siding to then remove the aluminum siding and put on the appropriate outer insulation on or not. My husband and I talked about it that night and decided to have it done right. I guess you can turn the aluminum in for scrap and get money back for it. Then maybe it would help to incur the cost of having this Chicago siding company put vinyl siding on our home that already had vinyl siding on it. I scheduled it to be done during the week of my vacation even though I would be there for everything they did. I just wanted to be there and see what all needed to be done to make it right. They did everything that they said they would do and I was very happy.