On some homes water tends to drip behind the gutters down the fascia and soffit and then either down the side of the house or straight to the ground.
Water dripping between gutter and fascia.
The gutter apron will prevent the dripping.
Without looking at the roof it seems that the water is missing the guttering because perhaps the previous owners may have had new fascias overlaid onto the old.
Unfortunately it doesn t always work that way.
When properly installed gutters direct roof runoff into a downspout system and safely away from the house.
Any rainwater or in sparodic areas then simply misses the gutter.
For example most ranch style homes have a 3 12 or 4 12 pitch roof.
Usually this is due to gutter fasteners rusting.
Over time rain gutters often start to pull away from the roof allowing water to drip over the gutter sides or between the gutters and the walls.
But what happens when your roof s gutters become worn out or cracked or clogged.
This then pushes the guttering out from the roof line by 9 17mm.
Capillary action is a water activity in which water adheres to a surface and follow the surface around.
Home centers sell a gutter apron in 10 ft.
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.
If water is dripping behind your gutter it s probably because it was installed without any flashing over the back of the gutter.
Water leaking in behind the facia of your roof could be caused by a couple of things.
Water leaking between gutter and fascia when there is rain the water is expected to roll down the roof and into the gutters.
The gutters then direct the water to a downspout allowing the water to run down until it reaches the ground.
1 your roof sheets have a hole in them or your screws or nails or equivalent are not watertight anymore or 2 the more common reason is where roof sheets are cut too short or they don t overhang far enough into the gutter.
A gutter apron is a bent piece of flashing that tucks up under the shingles and over the gutter.
This problem is common with homes that have roofs that do not have much pitch to them.