It’s a two story residence with two layers of aged shingles which will must be eradicated just before new roof getting mounted. And did I study effectively your responses to state if I set up standing seam, which i should have the current asphalt shingles taken off to avoid damage? https://travisrhtpc.boyblogguide.com/34424115/residential-standing-seam-metal-roof-installation-can-be-fun-for-anyone