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.
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.
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.
Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.
Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.
Greater overhang becomes a point of leverage for gusts of wind to rip off your roofing.
In this video we demonstrate how to install a gutter for a shed metal roof or house.
Once free slide the drip edge out and discard.
A typical metal roof overhang may be 2 to 4 inches or even less.
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.
It can be done.
How far into the gutter should roof tiles project.