How Do I Get Rid Of Mold On My Roof
How to Clean Mold Off a Roof
Also Check: How To Install Vinyl Stair Nose Molding
Whats The Safest Way To Clean Algae And Moss From Asphalt Shingle Roofs
You might think that taking a power washer to the roof is the quickest and most effective way to remove algae and moss from the shingles. But power washers are too strong for the shingle granules and will wear them down. Asphalt shingles are designed to withstand rain, not the force of a power washer. Power washing your roof will reduce its lifespan.
Instead, gently pray the roof down with a mix of half bleach and half water. Let the mixture sit on the roof for 20 minutes before you rinse it off. But be sure to wet your plants around the foundation down with water first. This will protect them from the bleach mixture run-off. Then, rinse your foundation plants down with clean water again, so they arent damaged.
Rinsing the roof after bleaching it wont make it look pristine. Your roof will actually look a bit worse before it gets better. The algae will slowly disappear with each rainfall after you bleach it. Moss, however, will look yellow right after bleaching. Gradually, it will loosen from the roof shingles. Once it does, then you can safely remove it with a leaf blower. It can take several weeks to several months for the moss to pull away from the shingles.
How Do You Get Rid Of Black Streaks On Your Roof
Roof algae can be easily removed by a simple roof cleaning.
The important thing to know is that while an occasional cleaning shouldnât harm your roof, doing it yourself may void any roof warranties or homeowner insurance policies you may have.
An internet search on how to clean black streaks on your roof will turn up several different homemade formulas as well as commercial brands for getting rid of roof algae.
Most formulas contain chlorine bleach and/or trisodium phosphate and water. While lye is more effective than bleach, it is corrosive and should only be applied using full protective gear.
âOxygenâ bleach, commonly known as the brand name Oxyclean, can be effective and is less environmentally damaging, but will not work as well as formulas with chlorine bleach or TSP.
Remember that even chemicals that are safe for humans can still kill or harm landscaping and vegetation!
Cleaning the Roof Yourself
If you decide to clean the roof yourself, never, ever use a power washer, even on its lowest setting. Not only is using a power washer pretty much guaranteed to void any roof warranties, it can damage shingles by causing the protective coatingâor even the shingles themselvesâto come off.
Cleaning your roof will require some preparation. Remove any lawn furniture and cover vegetation and landscaping. Overspray is inevitable, and even if the product you use isnât considered toxic, the runoff from your roof can cause plenty of mess on the ground as well.
Also Check: How Often Should You Pressure Wash Your Roof
How To Remove Mold & Algae On Your Roof
A lot of the dark streaky stuff found on roofs in wet climates like ours in the Lower Mainland and the South coast of B.C. is in fact, algae and not mold. There is difference between mold and algae and how they affect your roof. Algae commonly feeds on the limestone powder in asphalt shingles, while mold often thrives on plant and other organic matter that’s fallen onto your roof.
You can’t do anything to prevent algae and mold spores from flying through the air and landing on your roof, but you can help prevent mold growth by keeping the shingles free of organic matter.
Cleaning The Roof With Bleach And Trisodium Phosphate
The benefit of using Trisodium Phosphate is that it comes with sodium hypochlorite as the active ingredient. Cleaning your shingles with this solution requires a pressure washer with black soft spray chemical injector tip, 5.5 gallon system and hot water
The disadvantage of this is that trisodium phosphate strips paint from the roof. If the solution is left on windows, it dries leaving tough stains that are difficult to remove. It also contains phosphates that are harmful to the environment.
Recommended Reading: How Long Does An Aluminum Roof Last
How To Clean Roof Shingles From The Ground
If you are concerned about voiding the warranty on your roof shingles due to walking on them, then you can clean your shingles from the ground. In this instance, using a garden sprayer attachment with your hose is ideal. Put liquid bleach in the sprayer and apply from the ground. Apply bleach from top to bottom, as you dont want to spray up and under the shingles.
It is important to note that leaving the bleach on the roof to sit too long will damage the roof. Ensure that you rinse the roof after 15 or 20 minutes. Repeat if necessary until all the damage is gone.
Best Time to Clean an Asphalt Shingles Roof
The best time to clean a shingle roof is when there is no rain in the forecast for several days and when temperatures will not drop below freezing. Freezing will freeze water to your roofs surface, negating the effects of the cleaner.
Option One: Household Bleach
Algae stains can be removed with the mixture of household bleach and water. With this method, you spray wash the roof with a mixture of water and bleach to kill the bacteria. Pressure washers are not advised because of the damage they can do to the shingles. Before washing your roof, be sure to wet down any foundation plants with water. Rinsing everything around the houses foundation with water protects them from being affected by the bleach. Simply wash them down with clean water afterwards to prevent long-term effects. Applying a bleach or chlorine-based solution with gentler methods kills moderate algae, moss, and fungus growth almost instantly.
Recommended Reading: Is Dry Fog Mold Removal Safe
Recommended Reading: What Is A Living Roof
Option Two: Oxygen Bleach
For those against using straight household bleach, oxygen bleach is another alterative in eliminating algae stains. Oxygen bleach uses hydrogen peroxide versus sodium hypochlorite as an oxidizer. The result comes in liquid or powdered form for an eco-friendlier choice.
Once mixed with water, the power or liquid eliminates all foreign specimens without taking the color out of your shingles. In addition, it doesnt affect the vegetation surrounding your home. Using a pump sprayer, spray the solution on the roof continuously for 10 or 15 minutes. The oxygen bleach attacks the roof algae directly and begins to take the stains away.
After the allotted time, take a scrub brush and lightly scrub the shingles. Apply more solution while you work for a deeper clean and hose off the roof once finished. If needed, repeat the previous steps until the stains are gone.
Other special products for removing algae include:
How Much Bleach Is Safe For Your Roof
When using bleach, the amount you use is a key factor that will determine the results. According to ARMA a 50/50 solution of household strength sodium hypochlorite and water is sufficient to remove moss and algae. Below is a discussion from a roof cleaning expert explaining how much sodium hypochlorite is too much to damage your roof.
You May Like: How Many Roof Vents Do I Need
Benefits Of Using Bleachfor Roof Cleaning
Bleachis readily available and one of the fastest ways of cleaning algae from theroof and shingles. It is a strongcleaner that kills algae and fungus and removes stains that comes with it. Itmakes it easy to get rid of dirt on the roof and shingles.
There is no need of rinsing or inspecting theroof after the application.
Oxygenbleach is recommended because it does not harm plants and animals in theenvironment. It saves time and energy because there is no need of wateringplants and vegetation before cleaning the roof with bleach.
How Do You Get Rid Of Black Mold On Roof Shingles
People also ask, how do you remove black mold from roof shingles?
The less expensive solution is to spray wash the roof with a 50 percent mix of water and bleach to get rid of the algae. Just be sure to wet your foundation plantings first, and rinse everything in clean water when youâre done.
One may also ask, will bleach damage asphalt shingles? Chlorine bleach / TSP chemical combination can kill plants, and the phosphates hurt the environment. Chlorine bleach also dries out a shingle roof causing curling, and ultimately shortening asphalt roof shingles life. Roof Cleaner QSE does NOT CONTAIN bleach or chlorine chemicals.
Furthermore, how do I remove black stains from my roof?
Simply mix up a solution of two parts water to one part bleach in a garden sprayer. Spray down the affected areas of your roof with this solution, let the solution soak for about ten minutes, and then spray the cleaning solution off your roof with a garden hose.
What is the best cleaner for roof shingles?
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.
You May Like Also
Read Also: Exposed Fastener Metal Roof Screw Pattern
Recommended Reading: How To Fix A Rubber Roof Leak
Apply A Moisture And/or Microbial Barrier
Roofing materials and technology has advanced greatly within the last few decades.
One of those advances is the ability to apply chemicals to your existing roof that repels water, or prevents algae and mold from developing. New roofs are often constructed of materials that have these properties impregnated into them.
Also Check: Black Mold Bathroom Ceiling
Are Certain Roofing Materials More Prone To Algae
Algae are most likely to grow in certain environments. They prefer shaded, moist, humid areas, and they prefer to grow somewhere they can get nourishment. You are more likely to find algae growth on wood shingles and asphalt shingles, which is one reason many homeowners opt to go with metal roofs for their homes.
Black streaks on asphalt shingle roofs are the most common, perhaps due to how common this type of roofing is and also how great a place it is for algae to thrive.
If you have an asphalt shingle roof on your home, be sure you check it regularly for any signs of algae growth to help prevent premature aging.
Read Also: How Much Is A Flat Roof
Bleach Solution Will Remove Mold From Roof
Q.What do you think of the products and people who clean roofs of various stains? I have quite a few stains, and wonder if I need to hire a roof cleaner, or buy products such as Roof Begone at Ace Hardware. I have one of those zinc strips installed parallel to the roof ridge, but it is exposed only 1 inch and I still have the stains. I treated some lichen with a lot of water, and when the spots finally came off, they pulled off a lot of the shingle. DAN, Lynnfield
A. Roofs seem to be collecting a lot of stains of late: mold algae moss get on your roof. That Roof Begone sounds intriguing, but at $30 a gallon its as expensive as some paints.
Or make your own: one part bleach and three parts water, which will kill mold and algae, but algae needs scrubbing and an extra dose of the bleach/water solution. You can scrape off the moss, or treat with a strong stream from the garden hose.
Unless the power is turned way down, it is not a good idea to power wash an asphalt shingle roof.
Finally, those zinc strips will prevent new growth of all these pesky things, but will not remove whats already there. Other metals that will deter growth of the three peskies are copper and lead.
Q.Warm water is running from the cold water taps in both my kitchen and bathroom. Replacing the fixtures did not solve the problem. How can I fix it? NANCY, in Hottons chat room
I would avoid candles, they produce a lot of soot and other contaminants.
Can You Power Wash Asphalt Shingles
No. You should never power wash a roof. A garden hose sprayer is the highest pressure a roof shingle should experience no higher than 70 psi. Since pressure washers commonly spray up to and beyond 3000 psi, they should be avoided. Shingle manufacturers even ask that shingles not be walked on, much less pressure washed.
Using a pressure washer to clean your asphalt shingles can void their warranty and speed up the decay of your shingles. After pressure washing, youll likely notice tons of roof granules in your gutters because youve blasted your shingles too much. Avoid.
Recommended Reading: Where To Buy Rubber Roofing Material
Make And Apply The Bleach Solution
Put on rubber gloves and a breathing mask before proceeding, so you can protect your skin and your lungs from the fumes produced by both bleach and trisodium phosphate. In a two-gallon bucket, create a cleanser composed of 1/4 chlorine bleach and 3/4 water. Then, add one tablespoon of trisodium phosphate and mix well. Fill a handheld pump sprayer with the solution, and apply it to the moldy shingles only.
How To Clean Algae Or Mold Off Your Roof Shingles
Living in a humid area of the country like Florida, youve probably seen your asphalt shingle roofs with unsightly dark streaks on them. A blue-green algae known as Gloeocapsa Magma could be the reason you have the algae which is spread by airborne spores. Sometimes it can also be caused by an accumulation of mildew, mold, dirt, or defective shingles.
This discoloring can hurt the beauty of your homes curb appeal and the resale value of your home if you have it up for sale.
Algae stains dont show up below the metal flashing around chimneys or roof vents because the copper and the zinc coating on galvanized sheet metal are toxic to algae. Whenever it rains, trace amounts of metals are washed down the roof, inhibiting algae growth.
Algae Resistant Shingles
In recent years, roofing manufacturers have begun mixing copper granules into roofing products to produce algae resistant shingles. If you live in an area susceptible to algae growth, be sure to specify this type of shingle when replacing your roof, reports Todays Homeowner.
Also Check: Can You Paint A Roof
Homes With Outdoor Space Is More Desirable
People who want Chicago living are also looking for larger square footage and outdoor space. This has been accelerated by the COVID-19 pandemic, where homeowners want room for a home office or a virtual classroom. Because of this, there will be competition to find properties that offer both so its important to act fast.
What If I Like The Moss
Some homeowners find moss enchanting, like ivy growing up the side of their home. If youd like to grow moss or other plants on your roof, you could consider investing in a residential green roof. Thin, extensive green roofs are enough to grow succulents and mosses. If youre interested in taller plants, consider an intensive green roof.
Also Check: Metal Roofing Screw Pattern
How To Remove And Prevent Black Algae Stains On Asphalt Shingles
You have probably noticed that asphalt shingle roofs often have unsightly dark streaks, especially if you live in a humid part of the country. People usually think these streaks are caused by things like defective shingles, mold or mildew, or dirt, but in reality, it is caused by Gloeocapsa Magma, which is a blue-green algae that is spread by airborne spores.
This algae does not necessarily harm your roof, although it does affect the appearance of your roof and thus, diminishes your homes value.
You wont likely see theses stains just below the metal flashing on your vents or chimney because galvanized sheet metal has a copper and zinc coating that is toxic to algae. When it rains, the algae is washed away by a trace amount of these metals, which inhibits the growth of algae.
Do It Yourself And Save Big Bucks
Professional roof cleaners charge hundreds of dollars the bigger the roof, the more hundreds youll spend. And they have to repeat the cleaning every few years. If your roof slope isnt too steep and youre comfortable working on it, you can clean it yourself and save the dough.
Youll need a full-body harness, a garden sprayer, a garden hose and a nontoxic, noncorrosive roof-cleaning chemical. Some manufacturers sell a special tool applicator and rinsing tool, but if the staining isnt severe, you may not need them.
Read Also: Will Homeowners Insurance Cover A New Roof