Why Do I Get The Mold Stain On Roof

An undiscovered roof leak water draining into the foundation or debris gathering in a roof corner all create a nice moist place for mold spores to grow.

Why do i get the mold stain on roof.

Condensation occurs on the underside of the roof sheathing not beneath the insulation. Mold growth beneath the insulation would require a roof leak which you d typically notice on the ceiling inside the home before any real mold growth occurred. White stains on building roofs. The most common culprit is actually a blue green algae known as gloeocapsa magma that is spread by airborne spores.

We discuss roof cleaning approaches using chemicals and the most gentle possible means so as to avoid damaging. The second variable settled dust also can have a profound effect on mold growth rates. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. Condensation is the most common cause of mold growth in an attic.

As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see. A roof with little direct sunlight that collects debris or has improper drainage increases risk of mold. Black streaks on the north and west facing and shaded areas of your asphalt shingled roof can really wreck the appearance of your home. This article describes the causes cures for white stains or white deposits on building roofs.

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. Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. Mold is usually green or black in color and can be found in many different forms and patterns.

There are a few possible causes of mold stains. We describe common causes of white blotches or staining on roofs of different materials. Though often attributed to an accumulation of dirt defective shingles mold or mildew. These include roof leaks high humidity moisture and lack of ventilation.

How to get rid of algae on the roof. Asphalt shingle wood shakes or shingles stone roofs slate roofs. To combat this paint manufacturers add different antifungal additives with varying degrees of success. If the mold remains on the surface it will lead to ugly stains or black streaks.

The algae feed on the limestone in shingles. The most common type is known as gloeocapsa magma also known as blue green algae. It occurs when a thin layer of dust settles on the paint. This algae growth usually begins as small spots and then eventually becomes visible streaks.

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