Abstract: The standing seam vertical slitter makes it possible for roofers to remove an installed steel roof by cutting the standing or vertical seams that hold the steel sheets together. The machine grips the seam and slices it with a minimum of damage to the steel sheets. It cuts the seams quickly and without leaving the kind of dangerous debris on the roof that results from cutting the seams with a plasma torch or a corundum wheel or a metal-cutting saw. The standing seam vertical slitter works faster than conventional methods of seam cutting, and it does so without using up expensive tools such as corundum wheels and saw blades.