Algae On Roof

The algae growth on roofs are microorganisms which thrive in moist conditions.

Algae on roof. Most commonly algae and moss grow on roof surfaces that are shaded and remain humid. It specifically appears on the north side of a roof as the north side receives the least amount of sun or under tree branches that overhang a roof. Algae will grow flush against the shingles and fixtures on your roof. It can be brown gray blue or green.

Because moss and algae thrive and reproduce in damp and shady environments they can reproduce and spread on a roof. Roof algae generally have a black green hue. Cutting off tree branches that overhang the roof and block sunlight will surely help keeping your roof algae and moss free. Algae is not a plant but an organism spread by spores.

If you have noticed black spots or streaks on your roof you ve got algae on your roof. The roof can also suffer from the green microorganisms. Algae grow most often on wood and asphalt shingles or concrete tiles especially if they do not get a lot of sunlight. Keep the roof surface clean by blowing off leaves and fallen branches during seasonal maintenance.

The most common class of roof algae is gloeocapsa magma a bacterium that eats water and expels oxygen. It causes the black stains you may see on your roof. If the moist surface they land on is your roof that s where they bloom. They spread by releasing spores into the air.

Those spores usually require a moist surface to open. Algae is just a thin film of organic growth that can be removed by washing the roof with certified organic oxygen bleach. Algae growth is common on roof surfaces of several materials including asphalt shingles concrete and clay roof tiles and even slate. Many homeowners have to deal with algae or even lichen and moss on damp exterior walls and especially on the side of the house facing away from the sun.

Moss is thick algae is paper thin use stain solver oxygen bleach to safely clean. How to get rid of algae on the roof. Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad. Moss on your roof is typically green throughout the wet times of the year but can turn greenish brown during the drier seasons.

Algae on the outer wall are unlike ivy or wild wine a rather unwanted and unattractive greening of facades. Over time moss and algae can damage a roof and can cause it to degrade. Often algae that is identified as green when studied microscopically also looks black or quite dark on a roof surface.