Choosing the Right Roofing System Single Lock vs Double Lock Panels. Types Of Residential Metal Roofing. Compare The Different Styles Of Metal Roofing Including: Standing Seam, Corrugated Metal, And R Panel. There are three different types of standing seam metal roofing panels. All of these different panel types have there own sets of pros and cons. By the end of the video you will know which types of metal roofing is best for you