In Roofing, you'll find ribbed and crimped panel options. A 3-inch-wide rib panel has a raised ridge with 3 inches of flat space in between, then another rib, and so forth. A 5V panel has five ridges in a row, all shaped like the letter V. Both of these types are different than standing seam panels, which are expensive because the screws that fasten them to the roof are hidden. Ribbed and 5V Roofing panels both have visible fasteners.