Your siding is more than likely leaking there are many many ways your siding will leak.
Brown stains on house siding.
Algae stains usually green or brown sometimes black.
The browish stain left behind is from the tanic acid on wood your leak travels on before exiting in the.
Dirt from rain splash up algae lichens mold moss or even smoke or chemical stains have different causes and different preventative measures.
Clean tough stains off with a nonabrasive cleaner or a homemade vinyl siding cleaner of soap and water that won t damage the surface of the vinyl.
For tough spots like paint drips tar and pencil and pen marks use a nonabrasive bathtub cleaner or nylon scrub pad.
Algae very often appears as a flat green coating or stain on building siding and even on sidewalks and concrete photo above.
That might have been part of the problem.
Vinyl siding may appear maintenance free but if you are the proud owner of a home with siding you have already learned that it simply isn t so.
Given that this one had mushrooms growing out from between the siding planks i told them to remove the siding in this area.
Vinyl siding requires care to keep it looking its best.
Brown syrup like stains streaking down the siding on the exterior wall of the bathroom.
It s hard to see shotgun fungus itself because it s only 2 millimeters wide.
They are even as high up as my gutters.
Fast forward a week later and the stains have reappeared in the same spot.
Algae often causes black stains on roof surfaces and green stains on other building exterior surfaces such as concrete photo above left decks and building.
They are hard and when you pick them off they leave a small brown stain.
Also known as artillery or cannonball fungus sphaerobolus it uses internal water pressure to forcefully fire its spores similar to seeds up to 20 feet away the fungus sets its sights on bright areas so that means it will aim for any pale surface that reflects light such as the siding on your house.
It seems they are only on the siding above my mulch beds.
I thought it was bird droppings at first so i power washed it off.
This article discusses common causes of stains or discoloration found on vinyl building siding.
We get brown water stains on our siding over the winter but they mostly go away over the summer.
Distinguishing the type of stain found on siding is useful in deciding on the cause and thus the cure or prevention of staining.
Otherwise the situation is exactly like what i see on 50s houses.
I have black spots all over my vinyl siding thousands of them about the size of a ballpoint pen tip.
Since then there haven t been any issues with the siding however a week ago i noticed a bunch of brown streaks stains on the east side of the house.