Good: Nothing. Bad: Said that they were factory certified for Union roofing, but manfacture never heard of them. Not a square foot according to manufacture standards. Did not insure water prooofing around panels, trim not installed as promised, overhang of panels inadequaate to keep water from getting behing trim. Site manager said that he would return with replacement panel, but did not. Could never get them to respond to making a service call. Back side of roof not square at bottom, this allowed water to get under panel.. Other: Would not recommend them to my worst ememy..
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