Too much and the shingles can blow off.
Shingle gutter overhang.
In many cases and particularly as home ages and settles the roof edge at the eave edge can wave in and out by more than this amount.
Simply put this is faulty installation where the shingles extend too far over the edge of the roof or are too close to the edge.
The edge of the shingles should hang over a roof between an inch and an inch and a half or between a half inch and three quarters of an inch if drip edge flashing is installed.
The 3 4 overhang of the shingle creates a full 1 overhang from the fascia to the edge of the shingle.
The rake edge is the extreme edge of the roof on either side.
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.
Ed the roofer if what you say about fixing the problem cutting the edge is the proper way to do it than i m not terribly upset.
Too little overhang and the water can leak through into fascia boards.
The edge of a roof in professional vernacular is called the rake edge.
Gutters hung too high or too low.
A typical metal roof overhang may be 2 to 4 inches or even less.
I was worried that because the edge shingle is the bottom layer fixing this would require redoing it.
In this installment of our series on roofing problems we ll talk about incorrect overhang of shingles.
How to cut shingles off the edge of a roof in a straight line.
Too little can allow water to seep into rake or fascia boards.
Most shingle manufacturers recommend a 1 4 to 3 8 inch overhang over your eave which is where your roof ends by your gutter.