Mold On Slate Roof

If you ve had experience with mold and mildew in the home you know the best mildew remover is chlorine bleach.

Mold on slate roof.

To clean mold off a roof start by putting on rubber gloves a breathing mask and goggles to protect yourself from the harsh cleaning chemicals. Regular roof cleaning is critical for your roof as slate is easy to cleave and water absorbent. Then use a long handled brush to scour the surface of the shingles and loosen stuck on mold while it s dry and brittle. Those that tend to be the most humid furthermore they will only appear on the north side of the roof.

The black streaks are also known as black algae or roof mold. Slate is a sedimentary rock with miniscule layers that easily cleave. This quality is what distinguishes slate as a suitable roofing material. Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.

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 mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. Once turned into roofing material slate absorbs water and can naturally de laminate during the freeze and thaw cycles of winter. Technically the black streaks on roofs are a form of algae known as gloeocapsa magma.

How do we keep that fungus among us under control. Believe it or not those black streaks only appear on roofs in certain areas of the country. For this reason it works as well on a tiled roof as it does on a bathroom floor. Buildup of moss and debris on slate roofs hold moisture in the slates that can split them during winter.

Next mix 1 quart of bleach 1 gallon of water and cup of trisodium.