In almost every instance gutter installers take the path of least resistance and shove the gutter right underneath the roof shingles instead.
Overhang roof to gutter.
Greater overhang becomes a point of leverage for gusts of wind to rip off your roofing.
It can be done.
In this video we demonstrate how to install a gutter for a shed metal roof or house.
A typical metal roof overhang may be 2 to 4 inches or even less.
Once free slide the drip edge out and discard.
Here phil explains how much overhang a roof should have at the gutter.
Use a flat pry bar and hammer to pry the nails out of the drip edge gently.
Many installers deliberately bend down the overhang into the gutter to assure no wind blown rain goes between the overhang and the gutter effectively preventing water incursion behind the gutter.
Gutters should be hung where a straight edge laying on your roof shingles can easily extend over the front lip of the gutter this is the proper installment location for the high point of the gutter.
How far into the gutter should roof tiles project.
How to cut a gooseneck downpipe.
Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.