Thursday, November 24, 2022

How To Kill Mold On Roof Shingles

Whats The Safest Way To Clean Algae And Moss From Asphalt Shingle Roofs

How to Remove Moss & Mold from your Roof Shingles with Wet & Forget Roof Shingle Demo Video

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.

Choose The Right Day And Prepare The Area

Check the weather forecast and choose a cool or overcast day with little to no wind so the spray hits your shingles, not the neighbors. Those conditions allow the cleaning solution to soak deep into the algae colonies without evaporating too quickly.

Next, repair any loose shingles or flashings, and clean the gutters and downspouts so they can drain freely.

Then prepare the area by moving lawn furniture and covering vegetation, because youre going to have overspray. Even though the product we chose isnt toxic, the runoff can be pretty ugly. So a little prep work will save you cleanup time later.

Recommended Reading: Replacing Roof Trusses

Are Those Black Stains On The Roof Mold Or Algae

Mold, algae, and moss are very different organisms. Each requires a different method of safe removal and prevention to keep your roof healthy and looking good. Black stains or streaks on the roof will appear anywhere in the U.S., where its hot and humid. In Florida, roof discoloration is a common problem. Most people will refer to these stains as mold, but algae actually cause them.

Whats the difference between mold and algae seen on a roof? Mold is a fungus that eats a variety of nutrients to grow and thrive. In contrast, algae is technically a plant organism that requires all the things other plants need to grownamely, sunlight and moisture. Mold wont form on a roof because its allergic to sunlight, and as soon as the ambient temperature surrounding the mold becomes dry, the mold dies.

Moss, those green, feathery clumps you may see forming on the roof, is a different type of plant and isnt the same thing as algae or mold. Algae is a single-celled organism, while moss is not. Moss also looks like a plant with its tiny stems and leaves. Algae do not have plant-like characteristics. Instead, it spreads out as a clump of single cells and will be slimy to the touch.

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Removing Moss And Algae From Asphalt Shingles: The Bottom Line

Preventing algae and moss from growing on your roof is easier than trying to remove it. Removal can take several months before the moss can be blown away, revealing clean shingles underneath. Always keep your roof clear of overhanging branches, and clean your gutters regularly. If your roof in Tampa needs repaired thanks to unchecked moss growth, contact Code Engineered Systems today for a free, no-obligation quote.

Bleach Solution Will Remove Mold From Roof

What is the Best Way to Remove Roof Fungus? (Answered by a ...

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.

Read Also: Get Rid Of Mold In Bathroom Ceiling

Why Is My Roof Molding

Its probably not your fault.

The growth of roof mold, called Gloeocapsa Magma, has a lot to do with the local weather. If you live in a warm, humid area or a place that gets a lot of rain, youre more likely to notice the characteristic black stains forming on your roof. Other causes include a dirty roof or improperly installed shingles.

This type of mold also spreads quickly and easily through the air, so if your neighbor struggles with their roof molding, theres a good chance it will infect your roof soon.

The best way to prevent roof mold is to trim any plants or trees back from your roof , fix any leaks or other issues, and clean it often. However, despite your best efforts, you might still end up with this pesky mold on your roof. Keep an eye out so you can deal with it quickly when it starts to grow.

How Often Should I Clean The Algae Off Of My Roof

Algae can drastically affect your houses overall appearance, and the longer the mold or algae is on your rooftop, the more it will grow. Your roof will need to be cleaned every few years to ensure that mold or algae do not creep back up. If you have the equipment and your comfortable cleaning your roof yourself, this is a good option. However, if your roof slope is too steep or you dont have the proper equipment, then it might be worth it to invest in hiring professionals to clean your roof every few years.

Thats why we recommend lye soap and a cleanser that is made for roofs. That way, you get rid of all the mold without harming your roofs shingles. Always look for safe and non-corrosive cleaners when youre thinking about washing your roof . We want you and your home to be as safe and clean as possible, without compromising on either one.

Read Also: How To Get Mold Off Of Ceiling

How Can Homeowners Discourage Algae And Moss From Growing On The Roof

Trees overhanging the roof can encourage algae and moss growth. So trim back any overhanging branches. Twigs, leaves, and sticks that accumulate on the roof should be promptly removed with a leaf blower. Always direct the airflow down the slope of the roof, so debris doesnt get stuck under the shingles.

Keep the gutters clean and clear. If a higher roof is draining onto a lower roof, thats a recipe for algae and moss growth. A simple fix is to direct the downspout of the upper roof into the lower roof gutter.

If youre due for a roof replacement, then installing algae-resistant shingles is an excellent way to prevent unsightly algae growth. Algae hate copper, and you can also put strips of copper under the shingles nearest the roof peak. This will prevent future algae cells from making your roof their home. You can also replace your old asphalt shingles with new ones in a darker color to hide streaks and stains.

When Is The Best Time To Clean My Roof

how to clean mold off asphalt roof shingles with bleach

Another tip for washing your roof free of algae is to double-check the day you plan to execute. Verify the weather prediction and pick a moderate or overcast day with minimal wind. The less wind, the better to not accidentally spray the cleaners onto the rest of your house or a neighbors yard. A cool and overcast day is best for the algae to soak up the cleansers best and properly cleaned off for the roof.

Be sure that any loose shingles or broken gutters have been cleaned. We dont want anything to go wrong when it comes time to clean your roof. Although we recommend using a safe and non-corrosive cleaner, there will undoubtedly be run-off from the roof washing. Youll want to move any lawn furniture or cover anything that cannot be moved and might get in the way of the run-off. Since mold and algae will be coming off the roof, youll want to be sure it doesnt land on any patio furniture or an outdoor kitchen area. The run off will also make your lawn wet and damp and it may take some time for it to dry out.

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Saturate The Shingles With Wet & Forget

You will start the process by saturating the shingles with the roof cleaner. The biodegradable cleaner is a unique and effective way to clean any exterior surface. Upon application is will attack algae while protecting the integrity of your roof, getting rid of stains without harming it in any way! You can apply it once it has been diluted with water. The gentle cleaning action of a gentle cleaner will remove even the most stubborn stains. It doesnt require scrubbing, rinsing or harmful acids to clean your roof shingles. Its also safe for your skin too! It takes time depending on how much algae is present on your shingles. I may multiple applications but should be able to see initial results within 30 minutes 1 hour

Why Algae Grows On Roofs

The black streaks, a form of algae known as gloeocapsa magmaor roof mold, only appear in the most humid areas of the country. Therefore, its normal for the streaks to appear on the roofs north side. This side of the roof receives the least amount of sun and stays damp the longest.

The bacteria accumulated over time feed on limestone filler and moisture. The algae spores grow and darken, creating the dark streaks visible on roofs. These airborne spores can be carried from roof to roof and infest an entire neighborhood if left untreated.

Not only do the elements and creatures carry the bacteria particles from place to place, the particles foster the growth of other roof inhabitants. The black stains harbor a number of molds or fungi which require warm, humid environments. The fungi lack chlorophyll, giving the them the name of heterotrophs. They feed on organic matter since they cannot manufacture food from raw materials.

On the northern side of an asphalt roof gathers the most moisture, which raises the humidity and provides an abundance of organic nutrients for the fungi to feed off of. Another factor in supplying food sources to the fungi is the tar used in roofing. The substance is ultimately fossilized, dead organic matter.

However, the granule base of asphalt is consumed first along with the tar. The dislodged bases accelerate deterioration of the roof because it cannot prevent the effects of excessive heat or extreme weather.

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Difference Between Moss And Algae

Though they might be grouped as the same thing because they grow in the same area of your home, moss and algae are actually quite different and distinct.

Moss always appears more green and fluffy-looking than algae, though it might appear browner during dryer seasons. Moss will also grow up off the roof, while algae will grow flush to the shingles and fixtures, staying flat and unobtrusive. Algae will appear in many different colors such as gray, blue, green, or brown.

A small amount of moss is relatively harmless, but left unattended, it can grow and eventually damage your asphalt shingles. Moss should be removed. Algae actually fosters the growth of mold, which can lead to very serious issues. Algae, too, should be removed quickly and efficiently.

How To Use Bleach To Clean Other Types Of Roofs

How to Clean Algae and Moss Off Asphalt Shingles ...

Some types of bleach for instance oxygen bleach, can be used to clean other types of roofs. It is environment friendly and it does not damage the color of the roof on wooden roof shingle shakes. This procedure requires the bleach and water

  • Inspect it for algae, moss, mold, mildew, dirt and stains.
  • Dilute a solution of oxygen bleach with water and pour the solution in a pump sprayer,
  • Use a ladder to climb the roof and wet the whole roof with plain water using a garden hose.
  • Spray the affected areas of your roof.
  • Leave the solution on the roof for 15 minutes.
  • Use a garden hose to rinse the roof with water.
  • Repeat the same process until you get all the stains off the roof.
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    One Thing I Noticed Is That The Tiny Granules On The Shingles Seem

    In this way, how do you clean mold off a roof? Bleach may kill the top layer of algae and lighten the stains, but it doesnt kill the underlying algae. A mixture of trisodium phosphate , bleach, and water will also remove stains.

    How To Remove Stains From Asphalt Roof Shingles. Gradually, it will loosen from the roof shingles. The concept was a snow slide that used gravity to allow snow to slide off the roof rather than having to pull snow off a roof. Treating Roof Shingle Stains Like Rust, Cement & Paint from archer.ca Pour or

    Black Mold On Asphalt Shingles

    Black mold on asphalt shingles is ugly. You clean it and it returns year after year. In reality what you are seeing is not black mold but a bacteria that is called gloeocapsa-magma.

    Granted some of it could be mold but what is spreading like wildfire is gleocapsa-magma.

    When you are cleaning your house,your roof should be part of the regimen.Not an easy task but necessary.Simix can stop that.

    This bacteria is actually feeding off of your roof and it is crucial that you remove it or it will damage your roof.

    It didn’t start that way, as a matter of fact it stayed clean for years but now has become a yearly problem.

    The reason for that is the bacteria probably blew over from a neighbors house and set up shop. These large colonies live and die and what you are seeing is the dead carcass of a bacterium. The new bacteria feed off of their dead.

    With self cleaning coatings applied to the asphalt shingle, you will never see black mold again.

    One thing for sure you do not want to walk on your barrel tile as you could easily damage it.

    A dirty roof sticks out like a sore thumb, and it can actually infect your neighbors roof by spreading airborne spores from the algae growing on it.

    Just as a neighbors weeds can blow into your yard, your algae infested roof can actually spread the algae infestation to your neighbors place.

    Thats why the Homeowners Association sends out nasty letters!

    Black mold on asphalt shingles being removed with sunlight

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    Make Your Shingles Last Longer

    Roof stains are a common roof problem. Black streaks on the north- and west-facing and shaded areas of your asphalt-shingled roof can really wreck the appearance of your home. The roof streaks look like mold, but theyre actually algae colonies that form in your shingles and feed on moisture and the limestone filler agents in the shingles.

    Using shingles that have been treated with algicide keeps the growth at bay for about 10 years . But once the algicide wears off, your roof hosts an all-you-can-eat buffet for the neighborhood algae spores. So it pays to clean your shingles as soon as you spot algae growth.

    Apply A Moisture And/or Microbial Barrier

    Step by step soft wash roof cleaning: How to safely remove mold on the roof with no pressure washer

    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

    How To Clean Your Homes Vinyl Siding

    From dirt to grime to the fertilizers you spray on the lawn, home siding takes a beating. Fortunately, vinyl siding is relatively easy to clean so you can keep your home looking neat and well-maintained.

    Youll find many recipes for homemade siding cleaning solutions online. A good all-purpose mixture is 70% water and 30% white vinegar. This mixture is perfect for tackling light dirt and mold. Simply apply it using a soft cloth or a soft bristle, long-handled brush. Work the solution from the top down to eliminate streaking.

    If stains are stubborn or tough, its okay to try a household cleaner like Murphys Oil Soap or Windex. However its always a good idea to spot check the cleaner first to make sure it doesnt discolor the vinyl.

    Never use steel wool, nail polish remover, or other harsh solvents or products on vinyl siding.

    Pressure washers arent always the best option to clean vinyl siding. Some siding makers dont recommend pressure washing at all, while others may recommend using a specific amount of pressure. If you know which company manufactured the siding, check its website for recommendations.

    If you choose to pressure wash your homes exterior, point the stream straight at the siding. Pointing the stream at an angle increases the chance youll get water behind the siding, potentially allowing water to get into your walls.

    Did you clean roof shingles or siding but your home still looks shabby?

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