These substances can infiltrate the limestone mixture that attaches the shingle to the roof and end up harming its ability to repel water.
Roof with stains.
The most common type is known as gloeocapsa magma also known as blue green algae.
Here s how to clean the.
When that happens it is generally caused by mildew algae mold or dirt stains.
Make your shingles last longer.
Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water.
While doing little harm to your shingles the black streaks caused by the algae are unsightly.
In virtually any residential neighborhood in the u s.
Preserve the appearance of your roof by removing black stains promptly.
Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.
Conceal an unsightly water stain on the ceiling and put a stopper on the leak that caused it with these stain fighting tips.
Many homeowners mistake these stains for mold mildew moss or even tree sap.
While the recipe for cleaning a roof with bleach can vary the basic formula is.
This algae growth usually begins as small spots and then eventually becomes visible streaks.
Black stains on asphalt roofing products such as asphalt shingles or roll roofing caused by extractive bleeding.
It is not uncommon for roof shingles to turn black over time.
1 quart bleach 6 sodium hypochlorite 1 gallon water 1 4 cup tsp trisodium phosphate or other heavy duty cleaner don t use a cleaner that contains ammonia or is not.
Identify and repair the root cause.
Now that you ve.
Your first priority when dealing with a water stain should be to find the.
Catalog of types of stains on building roofs surfaces walls algae caused black or green stains on roof or other building surfaces some photos of black algae stains are at black.
Clean the stain with bleach.
How to clean roof stains wash your shingles where the sun doesn t shine.
Your stains are probably caused by the airborne spores of a blue green algae known as gloeocapsa magma which is often mistaken for mold or mildew.
Do shingles on your north west or other shaded roofs have streaky moldy stains.
Black streaks on the north and west facing and shaded.
Removing dirt sap and other stains there are a lot of different substances that can build up on your roof.
Algae can be killed and the stains removed using chemical cleaners though they usually return over time.
Roof stains are not only unappealing to look at they also compromise the waterproofing ability of your shingles.
Roof shingles are exposed to a lot of wear and tear as extreme heat sun wind and precipitation come into contact with them.