Lumber that has been treated with copper (CCA chromium copper arsenate, ACQ alkaline copper quaternary and Copper Azoles) should not be used when installing Gerard Stone Coated Metal Roofing products. These products have been found to be corrosive to steel and steel alloys. The use of such products will void the Lifetime Limited Warranty that is offered by Gerard. If treated lumber is required, Borate or Borax treated lumber can be used.
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