While just about any material-stainless steel, galvanized or Galvalume steel, copper, zinc or aluminum-can all be used for curved metal panels, some materials are easier to bend than others. "Aluminum tends to allow for a tighter curve with many panel systems," says James Bush, vice president of sales, ATAS International Inc., Allentown, Pa. "It may also allow for flexibility for field adjustment, as often a true curve is hard to build with various substrates to which the panels are applied."
"For curving metal panels, the softer more ductile materials are often preferred, but not required," adds Jones. "For larger radius conditions, any material can be utilized, but for tighter conditions, copper, zinc and aluminum are preferred. The most cost-effective approach is to use steel for larger curvature while using aluminum for the tighter applications.