There are a few elements that come into play that cause water to run behind the gutter.
Water getting behind gutter.
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.
The fascia itself is upvc not wood thank god.
At some point in the past an owner had vinyl siding installed over old siding.
This can be frustrating and also creates a dangerous situation on porch steps during freez.
The extra thickness of the vinyl.
The gutter apron will prevent the dripping.
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.
Left long enough the water runoff will cause damage to the roof shingles as well as your home s facade.
Some of the water may leak behind the gutters down towards the soffit and the fascia.
Rainwater leaking from a gutter ends up behind siding and causes a wall to rot.
Have rain water dripping out from between your facia and gutters.
Capillary action is a water activity in which water adheres to a surface and follow the surface around.
Water gets behind the gutter if water is dripping behind your gutter it s probably because it was installed without any flashing over the back of the gutter.
Unfortunately it doesn t always work that way.
My gutters are leaking from behind.
It s a bungalow so quite easy to access.
Water dripping down from fascia instead of gutter there is water dripping down from fascia when it rains.
If the gutter is clogged some of that water will back up on the roof soaking it.