Grey Roof Shingles Turning Black

Black brown or gray stains on roofing products due to debris left on the roof surface such as piles of leaves and organic waste from nearby trees.

Grey roof shingles turning black.

Roof shingles are exposed to a lot of wear and tear as extreme heat sun wind and precipitation come into contact with them. Why does this algae appear to be black. The algae will worsen and become more noticeable each year trapping moisture and causing premature shingle aging and granule loss. This is what makes those unattractive black streaks on your roof.

List of the pros of black roof shingles. Thus elimination of roof algae may reduce roof fungus and roof mildew accumulation. See debris staining roof debris and. Leaves twigs and tree bark roof algae stains are seen in nearly eighty percent of the united states in various degrees.

When that happens it is generally caused by mildew algae mold or dirt stains. Though often attributed to an accumulation of dirt defective shingles mold or mildew. The algae feed on the limestone in shingles. Gloeocapsa has the ability to form a protective darkly pigmented outer coating that shields the algae from damaging uv rays.

As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. So will removing loose debris from your roof shingle deck and gutters. The most common culprit is actually a blue green algae known as gloeocapsa magmathat is spread by airborne spores.

The color helps to retain more heat in the home. It is not uncommon for roof shingles to turn black over time. Even the thermal energy with cloudy skies gets picked up with this installation.