When gutters become clogged with debris such as leaves twigs and pine needles then water is no longer effectively channeled into the downspouts and away from your home.
Rain water running behind gutters.
If this is the problem a simple solution is to slip some trim coil or sheet metal up under the d edge and flash it over your gutter.
Many of the solid gutter covers are design to take advantage of this water characteristic.
If you have rain water running behind your gutters then it is likely that you have clogged gutters.
If the gutters are clogged it s possible that the water is overflowing the gutters and this is contributing to the leak.
Capillary action is a water activity in which water adheres to a surface and follow the surface around.
This product is an easy and inexpensive fix.
The purpose of this product is to prevent water from running behind the gutter.
When the roof shingles do not extend past the metal drip edge the water will suck back on the metal drip edge this is called capillary action and run behind your gutters.
Just as you had thought of doing.
The first cause is when the roofing material is installed many roofers will not extend the roofing material past the roof edging or drip edge.
There are a few elements that come into play that cause water to run behind the gutter.
Water should run out the downspout and away from the house without filling the gutter.