Black Marks On Painted Wood Siding Shingles

These stains don t respond to oxygen bleach.

Black marks on painted wood siding shingles.

Micro black spots on siding tags. Remove black stains from roof shingles to preserve the appearance of your home s roof. These black streaks are unsightly and can diminish the appearance of the entire exterior of the home. Oil based stains actually feed mold.

It just looks bad. As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see. When that happens it is generally caused by mildew algae mold or dirt stains. In wooded or shaded areas mold is going to present itself insidiously.

Others have said it s a. But now this black algae is termed a roof shingle algae because of the annoying discoloration on a asphalt shingle roof. Instead use a wood. The problem is that for many years the only semi transparent wood stains on the market were oil based.

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. Some tell us it s from spiders. Lawn garden we have thousands of tiny black spots pin head size all over the siding of our house. The black streaks running down roofs are actually a hardy algae called gloeocapsa magma.

Black stains on vinyl or painted building exterior wall siding may also be mold as our photo shows at above right. Black mold we have all seen wood sided homes that turned that death black color. It is not uncommon for roof shingles to turn black over time. See debris staining and see proximate cause of roof shingle stains.

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