Any rainwater or in sparodic areas then simply misses the gutter.
Mroof drips between the gutters and fascia.
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.
Water leaking between gutter and fascia when there is rain the water is expected to roll down the roof and into the gutters.
Why is a drip edge important.
The correct placement of a roof drip edge is on top of the roof s exterior cover directly between the sheathing and the fascia board which forms a drainage gap between the drip edge and the fascia board.
I have a 30 year old house which i have owned for the last five years.
This then pushes the guttering out from the roof line by 9 17mm.
A new roof is a huge project and one that has to be carefully balanced with the rest of the fixtures in and around your home.
But what happens when your roof s gutters become worn out or cracked or clogged.
The gutters then direct the water to a downspout allowing the water to run down until it reaches the ground.
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.
Other than being old and rusty they are working fine based on my obser.
Incorrectly sized poorly adjusted or shoddily fastened gutters can lead to excess space between the gutter and roof which will lead to water falling in between.
If the problem started popping up just after or recently after a roof installation there are good odds on the contractor not taking the gutters into account during the service and construction.