Seamless gutters provide a more secure gutter system because they are not pieced together. Every place where there are seams is a place where your gutter can leak and become damaged.  Seamless gutters are created on-site to the exact specifications of your property, so there is no waste like there is with pieced together gutters.  In addition, the machine that creates the seamless gutters is mobile and designed for on-site custom gutter fabrication. The companies that make this equipment have perfected the process so it is fast and efficient.  In the end, seamless gutters cost about the same as seamed gutters, but provide a longer-lasting solution with less change of damage.