Black stains on asphalt roofing products such as asphalt shingles or roll roofing caused by extractive bleeding.
Roof with stains.
Many homeowners mistake these stains for mold mildew moss or even tree sap.
Make your shingles last longer.
Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.
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.
Conceal an unsightly water stain on the ceiling and put a stopper on the leak that caused it with these stain fighting tips.
Here s how to clean the.
How to clean roof stains wash your shingles where the sun doesn t shine.
Or canada there s a chance you ll see at least one roof stained with black or dark brown streaks.
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.
Removing dirt sap and other stains there are a lot of different substances that can build up on your roof.
Now that you ve.
Roof stains are not only unappealing to look at they also compromise the waterproofing ability of your shingles.
Clean the stain with bleach.
In virtually any residential neighborhood in the u s.
This algae growth usually begins as small spots and then eventually becomes visible streaks.
Your first priority when dealing with a water stain should be to find the.
Identify and repair the root cause.
These substances can infiltrate the limestone mixture that attaches the shingle to the roof and end up harming its ability to repel water.
When that happens it is generally caused by mildew algae mold or dirt stains.
While doing little harm to your shingles the black streaks caused by the algae are unsightly.
Algae tree sap and leaves moss and many other materials get dropped or blown onto your roof.
While the recipe for cleaning a roof with bleach can vary the basic formula is.
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.
Do shingles on your north west or other shaded roofs have streaky moldy stains.
Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water.
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.
Preserve the appearance of your roof by removing black stains promptly.
Algae can be killed and the stains removed using chemical cleaners though they usually return over time.
Black streaks on the north and west facing and shaded.
