The other element is if the gutter is not installed behind the drip edge it creates an air gap between the top of the gutter and the bottom of the drip edge which allows a place for the water to go.
Detailed view seamless gutters installed behind drip edge.
If your gutter has been previously installed rather than taking it down and redoing it you can easily place a small strip of metal flashing under the drip edge and over the back of the gutter as shown by the illustration at the bottom of this page so the water will shed into the gutter.
Most premade drip edge flashin.
Drip edges have two key purposes.
Due to cohesion surface tension and other forces water droplets tend to stick to one another and to the surfaces they are on albeit slightly.
A drip edge is designed to take advantage of those forces and along with gravity direct water into the gutter.
Being a manufacturer of roof edgings and an installer of gutters i know first hand it s not always possible to get the gutter behind the drip.
Water stains dirt debris and dripping water behind a gutter are usually the result of poorly installed or missing drip edge.
This is a faster installation method but it also allows water to run off the roof and drip between the gutter system and the fascia a straight board that runs directly below the roof supporting roof tiles and.
The first mistake that some gutter installation agencies make is installing gutters on top of the drip edge called roof flashing.
Does the gutter go under over or behind a drip edge.
If the gutter is lower than the bottom edge of the drip edge install flashing behind the drip edge and over the back edge of the gutter to remove the gap.
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.
Use tin snips to cut the gutter apron flashing roll in two 3 in.
Direct water away from fascia.