Ask Todd Miller *Metal Roofing Expert

Can Metal Roofs Be Installed Direct Over Old Shingles?

Written by Todd Miller on March 8, 2017 | Filed under: Battens or No Battens,Roofing Answers,Roofing Installation

Q: Is it OK for metal roofing to be screwed down directly on top of asphalt shingles, without any wood or other material between the metal and shingle?

A. You may wish to take a look at the videos in our Metal Roofing 101 video series … there may be some topics of interest to you. I am also attaching a copy of my ebook on How To Buy A Metal Roof.

Very few metal roofs must be installed with battens. However, I always suggest a layer of underlayment over existing shingles. It is an extra safeguard against water and it also protects the back side of the metal from abrasions against the shingle granules. Additionally, I interpret the International Building Code as requiring this underlayment. Not all people interpret the code that way though.

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About Todd

Todd's expertise comes from his years of experience in metal roofing manufacturing. As president of Isaiah Industries, based in Piqua Ohio, Todd runs a several of the world’s leading manufacturers of residential metal roofing; Classic Metal Roofing Systems, Kassel & Irons, and Green American Home. His personal goal is to educate homeowners of the long-life benefits of metal roofing.

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