2 the more common reason is where roof sheets are cut too short or they don t overhang far enough into the gutter.
Water leaking between gutter and fascia.
1 your roof sheets have a hole in them or your screws or nails or equivalent are not watertight anymore or.
Usually this is due to gutter fasteners rusting.
This can be frustrating and also creates a dangerous situation on porch steps during freez.
If the gutter fills with water from organics knitting together over your downspout water can spill behind the gutter.
But what happens when your roof s gutters become worn out or cracked or clogged.
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.
Any rainwater or in sparodic areas then simply misses the gutter.
The gutters then direct the water to a downspout allowing the water to run down until it reaches the ground.
Assuming the gutters have the correct slope the main reason for overflows is that the gutters are full of debris and need to be cleaned.
When water drips between the fascia and the gutters the problem could be a compromised drip edge but it s also possible the gutters are overflowing.
This then pushes the guttering out from the roof line by 9 17mm.
Water leaking between gutter and fascia when there is rain the water is expected to roll down the roof and into the gutters.
Unfortunately it doesn t always work that way.
Water leaking in behind the facia of your roof could be caused by a couple of things.
If you re not closely attuned to the behavior of your home s water drainage system you may not notice this occurrence.
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.
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.