Why Is My Roof Black

The algae will worsen and become more noticeable each year trapping moisture and causing premature shingle aging and granule loss.

Why is my roof black.

But there are other roof stain colors and causes. The remedies for and means of preventing stains on roof shingles are discussed as well. Black roofs do not absorb heat in the winter under a foot of white snow. My biggest question is why are we still putting black roofs on our buildings.

They absorb heat during the hot days making it hotter. Black roofs explained by roofing contractor experts. Algae growth on asphalt shingles. While not extremely dangerous roof algae can still cause your shingles to fall off.

During heat waves some of the most vulnerable people are those living on the top floor of a building with a black roof. As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see. If you are a homeowner in northbrook il or the surrounding area it is possible for you may have seen unsightly dark or black streaks on asphalt shingle roofs. Dark black or brown roof shingle stains are often caused by black algae bleed through or extractive bleeding of asphalt dirt soot or organic debris.

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. Sometimes this is because of either dirt or defective shingles. The black streaks running down roofs are actually a hardy algae called gloeocapsa magma. Algae growth may cause discoloration on roofs resulting in brown or black streaks on a rooftop.

What might be mistaken as dirt or mildew is actually a type of blue green algae known as gloeocapsa magma. The algae feed on the limestone in shingles. These dark spots aren t dirt and mold building up you could be dealing with algae. This algae growth usually begins as small spots and then eventually becomes visible streaks.

The most common type is known as gloeocapsa magma also known as blue green algae. Like most types of algae this one thrives in humid hot environments like south florida. Why are there dark streaks on my roof.