Black streaks are often found on gutters and fascias just underneath the gutters.
Black streaks on rain gutters.
When it rains the water will drip down the front of the gutters collecting air pollutants debris and other contaminants.
Rain carries them down the sides of the gutters where they stain the aluminum.
The black streaks are caused by the runoff from your roof.
Gutters made 15 years ago are much higher quality than the ones made today.
The black streaks are a result of electrostatic bonding of tar asphalt from roofing material and other debris to aluminum metal material.
Instead of replacing the gutters there is a quick and easy alternative to getting the streaks out of your gutters.
The contaminants will attach to the gutter oxidation in another process calledelectrostatic bondingand over time will cause those unwanted black streaks.
You can try a variety of products but success depends on your geographic area.
The black streaks on your gutters are caused when dirty water runs off of your gutters.
Streak getter will break down this bond which will allow you to remove the unwanted streaks off your aluminum gutter with little effort no scrubbing.
These streaks can make your gutters and fascias look worn and old.
It is a combination of dirt from your roof being washed off and asphalt from your roofing as it breaks down over time decomposing organic.