Black Mold On Slate Roof

For this reason it works as well on a tiled roof as it does on a bathroom floor.

Black mold on slate roof.

Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad. Slate is one of the most durable and popular materials used in construction. 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. The most common type is known as gloeocapsa magma also known as blue green algae.

That s why if. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. This quality is what distinguishes slate as a suitable roofing material. Those that tend to be the most humid furthermore they will only appear on the north side of the roof.

Once turned into roofing material slate absorbs water and can naturally de laminate during the freeze and thaw cycles of winter. Like all tile however slate can be prone to mildew and mold particularly if it is installed in a high moisture area like a bathroom a basement or a kitchen. The black streaks are also known as black algae or roof mold. Believe it or not those black streaks only appear on roofs in certain areas of the country.

At worst they can pose serious health risks. What are those ugly black streaks on my roof. Slate is a sedimentary rock with miniscule layers that easily cleave. It s easy to let a mold problem sneak up on you on in out of the way places like the roof of your home.