What Causes Mildew On Roof Shingles

How to get rid of algae on the roof.

What causes mildew on roof shingles.

If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad. Moss is attracted to moisture and therein lies the problem. Though often attributed to an accumulation of dirt defective shingles mold or mildew.

Though often attributed to an accumulation of dirt defective shingles mold or mildew. Some black stains on asphalt roof shingles are caused by a black algae typically gloeocapsa magma. Black algae stains on asphalt singles some black stains on asphalt roof shingles are caused by a black algae sometimes misnamed as a black fungus or even a mildew such as that shown in the photograph here. There is some concern regarding the use of chlorine based products on asphalt roofs.

As i mentioned before moss typically grows in the cracks between each shingle. These black roof algal stains are sometimes misnamed or misidentified as a black fungus or even a mildew. The most common culprit is actually a blue green algae known as gloeocapsa magma that is spread by airborne spores. The most common culprit is actually a blue green algae known as gloeocapsa magmathat is spread by airborne spores.

Apparently the sodium causes an electrochemical reaction that reduces the elasticity of the asphalt leading to stiffness brittleness and curling of the shingles. Known as black algae or roof mold gloeocapsa magma is usually blamed on dirt accumulation mold and mildew or defective shingles. Although mold can grow in your roofing materials if water gets trapped somewhere if you see any of the following on top of your roof algae are more likely your problem. It is easily spread and causes those colorful stains on so many roofs.

The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. Also moss absorbs water when it rains and retains it for long periods which can lead to mold bacteria and the decay of the roof s framing over time. I suffer from two of. As it grows thicker it lifts and loosens shingles and allows water to leak through.

Black streaks green or white spots round lichens mosses green moss that spreads across your roof. It needs heat moisture and nutrients to grow. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. It s actually just a blue green algae spread by airborne spores.

Black algae stains may be mistaken for but are not extractive bleeding a product cosmetic defect.