How do I get rid of algae on my roof?

The most effective method of cleaning algae and moss from a roof is with a 50:50 mix of laundry strength liquid chlorine bleach and water. Apply with a sprayer and allow the solution to dwell on the roof surface for 15 to 20 minutes, and then rinse thoroughly with low pressure water.

What is roof algae called?

Roof Cleaning and Maintenance – Roof Algae The most common culprit causing these unsighlty stains on asphalt roofs is a blue green algae called Gloeocapsa magma. The unsightly growth usually occurs on the north or west side, as well as, shaded areas of the roof system.

What does algae do to shingles?

The Effect of Algae on Roof Shingles Algae are able to grow on the limestone granules in asphalt shingles. As the algae slowly consumes the limestone, the shingle itself becomes weakened. As time goes on, algae can combine with fungus on your roof to produce a more advanced life form, a lichen.

Should I pressure wash my roof?

NEVER aim your pressure washer up the roof, as it can push water under the shingles. Spraying water under your shingles can both tear off the shingles and force water under them and into your home.

What causes algae to grow on roofs?

Overhanging branches, clogged gutters, standing water, a porous roofing material, and poor roof ventilation can all cause roof algae. Taking steps to clear your roof of common issues can help you stay ahead of algae growth.

How long does it take for algae to grow on roof?

Algae can overtake a new roof in four years or less in the right conditions.

Can algae damage a roof?

HARMFUL TO YOUR ROOF AND YOUR HEALTH Algae: They like dampness and shade, so algae spores can grow on wood shingles or shakes and asphalt shingles that don’t get much sunlight. Because roof algae retain moisture, they can cause shingles to deteriorate and eventually rot completely.

What causes algae on roofs?

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. The moss can then create a layer of algae/lichen growth on your roof by collecting windblown soil and spores. Unlike algae and moss, mold is not a healthy plant.

Is soft washing a roof safe?

This has been said to effect roofs severely and can take up to 10 years off the life of a roof. Soft washing is the only way to effectively remove this algae without damaging the shingles and voiding any warranty. Pressure washing a roof, even at low pressure, can and will void your warranty and cause granular loss.

Is algae on roof bad?

What is Roof Algae? The black mold-like stains and streaks that appear on roofs, particularly light-colored asphalt shingles, is actually a blue-green algae (Gloeocapsa magma). Commonly found in climates with warm, humid summers, it does no damage to the roofing, but it certainly does looks bad.

Why do I have algae on my roof?

Algae staining on roofs all start out being spread by wind, birds, and varmints, affecting homes across much of the United States. This algae normally begins its lifecycle as airborne spores that will settle on your roof, especially those roofs that have asphalt shingles.

What can I do about Moss and algae on my roof?

Remove Debris – Removing debris from shingles and gutters often, especially after a storm, is another way to prevent moss and algae from growing. Debris like leaves, twigs, and pine needles trap water against the roof, creating the perfect environment for moss and algae to grow.

What causes Moss and algae to grow on shingles?

Debris like leaves, twigs, and pine needles trap water against the roof, creating the perfect environment for moss and algae to grow. By keeping roofs and gutters clear of debris, you can prevent algae from growing on your shingles.

What causes the mold and Moss on the roof?

The black mold-like stains and streaks that appear on roofs, particularly light-colored asphalt shingles, is actually a blue-green algae. Tom Silva installs a zinc strip to keep roof algae from coming back. What causes the mold on my roof? How can I get rid of it? How can I keep it from coming back? What is Roof Algae?

How do you clean algae off of roof?

To clean an asphalt shingle roof to remove black algae stains: Mix Cleaner: Mix up oxygen based cleaner with water in a five-gallon bucket, following the instructions. Wet Roof: Lightly wet down the roof using a garden hose. Apply Cleaner: Use a stiff bristle brush to apply the cleaner to the roof, being careful not to damage the shingles.

What is the best roof algae cleaner?

The most effective method of cleaning algae and moss from a roof is with a 50:50 mix of laundry strength liquid chlorine bleach and water.

Is that mold or algae on your roof?

Even if you have dark, mold-like stains on your roof, you may not actually be experiencing mold . It is highly possible that these stains are actually blue-green algae common to areas that experience humid summers. While the algae stains are unattractive, they are not hazardous to the health of your family.

How do you get rid of algae on metal roof?

Mix together one quart of bleach with one gallon of water and a quarter cup of the TSP. Put this mixture into your pump sprayer and evenly coat the algae stains on your roof. Let the mixture sit on your roof for about 15 minutes to kill the algae, then rinse with a hose to remove.