Look on top of the mesh and see if there is any debris on it generally the first cause of rainwater coming over the gutter is because there is a lot of debris on the mesh.
Debris collects in gutter valley ends over straight run.
A layer of needles at the bottom of your gutter is one of the toughest items to get rid of when you re cleaning your gutters.
Some of the worst debris for your gutters is the debris that s nearly invisible.
If not a gap between the underside of the front edge of our gutter guard and the front lip of your gutter can cause rainwater to run over the gutter.
This fine debris can slip into your gutters unnoticed and can accumulate there causing water to back up or gutters to warp and sag.
Roof valleys are a common problem area for gutters and gutter guards.
And thankfully it s relatively easy to fix more on this topic below.
The problem with a splash or diverter being installed is that it stops debris from being washed or blown off the roof.
Fine debris can slip into your gutters.
In this case there s a roof valley that ends over a straight gutter run.
It s the most common reason for overflowing gutters.
I recommend gutter covers if you have a steep pitched roof and you get a water flow gutter covers.
To sum it up gutter diverters can help with overflowing water in gutters only on inside or outside gutter corners.
The photo to the left shows a gutter with a inside miter at a roof valley.
The debris is piled up against what is called a splash or diverter its purpose is to keep the water from over shooting the gutter.
I do not recommend gutter covers if you have a low pitched roof and i don t recommend mesh gutter covers.