What Causes Dark Stains On Roof

Over time this algae accumulates developing a black outer coating which causes stains on roof shingles.

What causes dark stains on roof.

Rust or chimney soot stains red or brown rust stains around chimneys is a common roof stain. The streaks are caused by a type of algae known as gloeocapsa magma. While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely. Here are some clues to follow.

The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. Quite a few other issues can cause stains on a roof. As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see. The algae feed on the limestone in shingles.

The solution might involve anything from waterproofing the roof to pruning the trees in your yard. It is most widespread in the eastern united states and is commonly found on roofs with northern exposure. Dark streaks or roof discoloration caused by algae happens in varying degrees across the u s especially in areas exposed to warm humid conditions. Once stains redevelope and stay then it s time to recoat the entire roof since this dark algae can develope anywhere upon it.

Although these dark spots and ugly black streaks on your roof may look like dirt mildew soot or mold what they really are is algae. To identify a roof leak you should look for the obvious factors like missing or damaged shingles roof tiles torn flashings or loose screws on the exterior of the roof. The area can be cleaned and. Other causes of roof discoloration.

The most common type is known as gloeocapsa magma also known as blue green algae. If your household water pressure isn t enough to generate the proper nozzle pressure at the jets the manufacturer recommends boosting it. The black streaks running down roofs are actually a hardy algae called gloeocapsa magma. Roof leaks are the main cause of water stains on the ceiling.

Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad. The algae feed off of the limestone within the roof shingles.