Most premade drip edge flashin.
Incorrect drip edge gutter installation.
Home centers sell rolls of 6 in.
Water stains dirt debris and dripping water behind a gutter are usually the result of poorly installed or missing drip edge.
A gutter apron is used where shingles are not far enough from the edge of the gutter.
Use tin snips to cut the gutter apron flashing roll in two 3 in.
On the eave side of a house such as this i install a 3 x3 piece of flashing to slide the gutter under.
There are two reasons for water getting behind the gutter.
One of the reasons is that your shingles may be too short.
Rain gutter installation can be a tricky job and a lot of.
If there s a drip edge installed where the fascia meets your shingles and the gutter is hung below the drip edge get some roll flashing and tuck it up under the drip edge and over the top of the gutter.
It is put under the shingles of an attic to flow water directly into the gutter.
A gutter apron is installed on the corners above roof decking.
Not sure if there s a name for it but i call it drip check.
Not an uncommon problem.
The whole purpose is to direct the water into the gutters.
For proper water drainage the drip edge on the rakes should always overlap the drip edge on the eaves.
The guttering should run a few inches lower than your roofline.
Make sure the drip edge coming from the shingle is bending against the fascia board because when it rains it s going.
While on the other hand a drip edge is installed to the trim and usually hangs directly behind the back of the gutter.
This works out correctly if you do the eaves first.
With what you have there you d probably be better to install a strip of metal under the drip edge and over the gutter.