For self assembly the easiest way is to use a suspended type of structure which provides for fastening the gutter to special hooks located along the eaves.
How to install gutters on a metal roof.
If you don t want to remember to clean your gutters or you don t find balancing on a ladder to be a safe fun way to spend your weekend you can install a gutter cover.
With the three blades on the inside of the tube hold the crimper against the inside corner of the tube and squeeze.
Crimp one end of the short length of downspout with a special sheet metal crimper.
Crimp three times across both long edges and twice on the narrow sides.
This option is preferable since wall gutters that are used on seam roofs are the task of professionals who cover the roof of the house.