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.
Gutter leaking behind.
Use a commercial gutter sealant to patch leaks in seams.
When the roof shingles do not extend past the metal drip edge the water will suck back on the metal drip edge.
This problem is common with homes that have roofs that do not have much pitch to them.
In other words they prevent water from backing up behind the gutter and then leaking into the fascia and soffits.
Vinyl gutters with cracks more than about 3 4 inch in length should be replaced.
For example most ranch style homes have a 3 12 or 4 12 pitch roof.
A gutter apron is a bent piece of flashing that tucks up under the shingles and over the gutter.
Chris deziel chris deziel is a contractor builder and general fix it pro who has been active in the construction trades for 40 years.
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.
Rain gutters take a lot of abuse.
If water is dripping behind your gutter it s probably because it was installed without any flashing over the back of the gutter.
Gutter flashings are typically installed beneath the roofline and inside the gutters themselves.
Second gutter flashing increases the efficiency of your gutters ensuring that the water is going where it s expected to go.
How do you address the problem of water running behind your installed gutter.
It will also stop leaks from small holes and cracks.
Rushing water during rainstorms exposure to weather extremes heavy loads of snow in the coldest climes clogs of fallen leaves and the general ravages of time.
The gutter apron will prevent the dripping.
Unfortunately it doesn t always work that way.
When it rains water is supposed to roll down the side of your roof and into your gutters through the gutters to a downspout into the downspout and away from your home s foundation.