What s probably happened is the slack roof plumber has ordered sheets too long for the job and cutting them back with snips to the correct size a bit time consuming.
Minimum roof overhang into gutter.
I d suggest that a 50mm overlap from edge of gutter mounted on fascia board is adequate.
Do not lay further sheets if any sheeting is uneven or crooked this will save you a lot of remedial work which can be very hard work indeed.
Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.
The bottom tile or slate of the roof covering should project at least half way into the gutter the ideal distance is between half way and two thirds of the way over.
This problem can be overcome by having your sheets hanging a minimum of 50mm into the gutter.
Over this dimension is problematic like you have.
Here phil explains how much overhang a roof should have at the gutter.
In fact in most places i was unable to get my fingers never mind my hand into the guttering to clear it.
1 replace your roof sheets with new ones or.
Looking right down the line of the guttering the gap between the end of the last roof tile and the outer edge of the guttering varies from around an inch and half to in some cases millimetres.
Here phil explains how much overhang a roof should have at the gutter.
Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.
If you already have your roof sheets installed you need to do one of two things.
What type of sheet has been used.