Black Marks On Painted Wood Siding Shingles

The problem is that for many years the only semi transparent wood stains on the market were oil based.

Black marks on painted wood siding shingles.

The algae feed on the limestone in shingles. It just looks bad. Black stains on vinyl or painted building exterior wall siding may also be mold as our photo shows at above right. Oil based stains actually feed mold.

When that happens it is generally caused by mildew algae mold or dirt stains. The black roof stains are caused by a form of algae that has been around for years typically found in the woods on the north side of trees or on exposed rocks. Instead use a wood. Remove black stains from roof shingles to preserve the appearance of your home s roof.

The iron found in galvanized fasteners as well as some window screens and flashings can cause blue or black stains on cedar. These stains don t respond to oxygen bleach. Lawn garden we have thousands of tiny black spots pin head size all over the siding of our house. The algae will worsen and become more noticeable each year trapping moisture and causing premature shingle aging and granule loss.

As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see. Some tell us it s from spiders. These black streaks are unsightly and can diminish the appearance of the entire exterior of the home. Micro black spots on siding tags.

It is not uncommon for roof shingles to turn black over time. The black streaks running down roofs are actually a hardy algae called gloeocapsa magma. See debris staining and see proximate cause of roof shingle stains. 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.

Black mold we have all seen wood sided homes that turned that death black color.