I guess it would be nice to know how you and everyone else sometimes transfer their thoughts from after reading the poster's question to creating your answer. What I mean is I visit this bbs from time to time. The guy didn't say he had shingles. In your post for my benefit and for anyone else reading your answer it would be nice to know how you went from asphalt to shingles. How do you know he is talking about shingles and not a hot tar roof? I am not questioning your background or knowledge on shingle roofs or any roofing. Just for future reference, your audience that's asking the questions and reading them want to know. All your pros know all this.