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https://www.metalroofing.com/spirit/comment/9655/find/
Most all types of metal roofing can be installed over existing shingles. Some manufacturers recommend installing battens over the shingles to allow for a more consistant attachment surface for the new roof. Consult the manufacturer of the metal roofing you intend to use for requirements specific to their product.
6/3/2007
6/3/2007
NCI Building Systems, Inc.
6/5/2007