Why Dp Asphalt Shingle On Roof Look Dirty

If you don t notice this in time the cracks may allow water to penetrate other layers of the roof.

Why dp asphalt shingle on roof look dirty.

This algae growth usually begins as small spots and then eventually becomes visible streaks. Though often attributed to an accumulation of dirt defective shingles mold or mildew the most common culprit is actually a blue green algae known as gloeocapsa magma that is spread by airborne spores. They say that while shingle manufacturers offer products treated with copper or zinc to inhibit algae growth their effect wears down over time. If you can see voids or gaps beneath the bottom edges of the shingles even after the roof has had a chance to seal the problem might be due to faulty installation.

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. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. But there are other roof stain colors and causes. Reasons why shingles fail.

The most common type is known as gloeocapsa magma also known as blue green algae. We ve already alluded to some of the reasons why you may develop problems with your asphalt shingles. 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.