Home centers sell a gutter apron in 10 ft.
Roof to gutter overhang.
The deeds to the house may specifically provide a right for them to be there.
In almost every instance gutter installers take the path of least resistance and shove the gutter right underneath the roof shingles instead.
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.
The gutter apron will prevent the dripping.
A gutter apron is a bent piece of flashing that tucks up under the shingles and over the gutter.
If the overhanging gutters have been in place for over 20 years then the owner may have acquired a prescriptive right for them to be there.
If water is dripping behind your gutter it s probably because it was installed without any flashing over the back of the gutter.
A typical metal roof overhang may be 2 to 4 inches or even less.
I have a roof that only has a sort of moulding that transitions from roofing to the walls.
If there is an overhang the following principles can legitimise what would otherwise be a trespass.
The reason for this is that whenever rain runs down any type of roof when it gets to the lower edge it clings to the tile or slate by capilliary action this means that the water actually runs around the bottom edge and slightlly back up the rear of the tile before gravity allows it to drop into the gutter.
Since there is only about 3 4 of vertical material to anchor gutters clips are there any specialty hardware or other techniques to hang gutters along this facia.
Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.
Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.
If you can get or make brackets long enough yes screw them to the wall.
I have the same problem but in my case the roof sticks out 18 so i simply drilled small holes at the end of the roof and attached wire loops to hold the gutter in place.