Q. How common is aluminum standing-seam roofing? It seems that this profile would be better suited for heat-related expansion and contraction than corrugated aluminum panels fastened through their face, but my local suppliers carry only steel standing seam.

A. Todd Miller, president of Classic Metal Roofing Systems in Piqua, Ohio, responds: Aluminum is a perfectly viable material for standing seam, though probably 85 percent of metal standing-seam roofing is produced from either galvanized steel (which has a protective metallic coating that is primarily zinc) or galvalume (which has a protective...

or Register to read the full article.