The use of metal roofing in such projects is complicated by the fact that there is no universal "seal of approval" for historical products. Restoration projects are generally governed by a historical preservation society or similar local body, and products used in the restoration process are subject to their approval. When working on a historic project, be prepared that it may take extra effort to sell the local authorities on the use of metal as a substitute for traditional tile. Here are some general guidelines that may be of help.
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