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My house was built in 1920. At some point about 45 years ago, a metal roof was installed over the original cedar shakes. The roof is very sound and has never been unpainted or exposed to the elements. But since the removal of lead from paints, it just wont adhere, and so by now, there has so many layers of ugly, rough, uneven paint, it's got to go. I've read we can put metal over metal, and I'd like to avoid ripping off the existing roof, but I'm getting all kinds of answers from roofers, some of whom insist the the original shake has to come off...my attic is finished and in use and opening it to the sky is just not possible. Again, the only real issue is cosmetic, but I can't stand this mess any longer. Any ideas how to go? Thank you in advance for input.
10/2/2019
Or copy this URL: https://www.metalroofing.com/spirit/comment/24488/find/Building codes in most areas limit structures to two layers of roofing. Even if you do not have that requirement in your area, my recommendation is to remove the two layers. Having a third layer will be a red flag for home inspectors and mortgage holders in the future, as well as insurance companies. Additionally, trying to ensure secure fastening through those layers will be very difficult at best.
Isaiah Industries, Inc.
10/2/2019
Or copy this URL: https://www.metalroofing.com/spirit/comment/24490/find/Thank you...I can understand removing the existing metal, but the original cedar shake is what I'm trying NOT to remove. If the first metal roof was able to be attached to that, with it removed, I guess I'm not clear on why a new metal roof couldn't be installed over the single layer of shake/shingles?
10/3/2019
Or copy this URL: https://www.metalroofing.com/spirit/comment/24497/find/Thanks. There is nothing stopping you from trying this though it likely will leave a very rippled / uneven appearance in the new roof as well as a roof that is not easily walked. Additionally, when you tear of the metal roof, the old wood shingles likely to get pretty torn up themselves and may not provide a very suitable base. Personally, I don't feel very good about the idea but ultimately it is up to you ... and you're there first hand to the able to judge the condition of the old wood shingles once they are uncovered. I understand your thought process of, if it was done before, why can't it be done again?
Isaiah Industries, Inc.
10/3/2019
Or copy this URL: https://www.metalroofing.com/spirit/comment/24498/find/