What Causes Dark Stains On Roof

It is most widespread in the eastern united states and is commonly found on roofs with northern exposure.

What causes dark stains on roof.

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. The algae feed on the limestone in shingles. The solution might involve anything from waterproofing the roof to pruning the trees in your yard. The streaks are caused by a type of algae known as gloeocapsa magma.

Here are some clues to follow. The most common type is known as gloeocapsa magma also known as blue green algae. 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.

Other causes of roof discoloration. As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see. The area can be cleaned and. 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 black streaks running down roofs are actually a hardy algae called gloeocapsa magma. Quite a few other issues can cause stains on a roof. Dark streaks or roof discoloration caused by algae happens in varying degrees across the u s especially in areas exposed to warm humid conditions. Roof leaks are the main cause of water stains on the ceiling.

Rust or chimney soot stains red or brown rust stains around chimneys is a common roof stain. Once stains redevelope and stay then it s time to recoat the entire roof since this dark algae can develope anywhere upon it. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely.

If your household water pressure isn t enough to generate the proper nozzle pressure at the jets the manufacturer recommends boosting it. Once you identify the leak have someone fix it before you intend to remove the water stains so that the stains do.