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Is Moss Growing On A Roof Bad

Is Moss Bad For My Roof

Is Moss Bad for Your Roof?

Simply put, moss is harmful to your roof. Moss grows exceptionally well in dark, cool, wet climates. This makes the possibility of moss growing on your roof dependent on the environment in which you live. Even though moss is terrible and can need treatment does not necessarily mean that you need an entirely new roof. Moss does not always indicate damage, especially if you take preventive steps and catch it early.

Do I Need To Replace My Roof If It Has Moss

The good news is that you dont always need to replace your roof if it has moss. As long as the structural integrity of your home isnt compromised, youll just need to remove it, complete any necessary repairs, and take measures to prevent it from returning. However, its best to get the opinion of a roofing professional to see whether it needs to be replaced or not.

Why Is It Bad To Have Moss Growing On Your Roof

Why is it Bad to Have Moss Growing on Your Roof?

Answer: Moss can cause many types of damage.

You may nothave noticed it, but many roofs have some level of moss growing on theshingles. While moss may seem harmless, it can cause a lot of damage to theroof and should not be left there.

Firstlets talk about the bulk of the flowering moss. It can cause dams and leaks on slopedroofs. When moss grows in moist areaswhere water is restricted by nooks and corners, rainwater will back up behindit. Sloped roofs are not built like swimming pools. They arent completely sealed! The design ofthe roof underlay and covering depends on gravity to pull water downhill. If the water pools up too much, itll getbehind flashings and underlay overlaps and into the home, causing expensivedamage. This is also true of debris inthose tight corners around dormers and fancy, restrictive designs. Flowering moss falls into gutters and alsogrows in them, causing overflowing gutters, with misery and possible structuralrot.

Some saythat moss gets between the shingles and weakens the system that way, but in my35 plus years of working on roofs, Ive never seen that happening. The roofing is normally too strong forthat. What we do see happeningconstantly on asphalt roofs is degranulation and weakening of the surface.

Moss isbad for your roof and your economic health. So, what can be done?

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Trim Trees And Limit Shade

Moss thrives in environments that dont get much direct sunlight. This includes areas that have plenty of trees, overhanging branches, and ultimately, shade. The good news is that you can do something about it! Regularly trim your trees so that theres less shade on your roof throughout the day, and remove any trees that are too close to your house or may present any problems in the future. This is also good because it helps prevent debris from landing on your roof, which provides it with the right nutrients to start growing. Your local tree service company will be able to help you with tree trimming or removal.

How Much Does It Cost To Remove Moss From My Roof

When to repair your roof

If you do it yourself, the materials you need to remove moss from your roof are inexpensive.

All you need is a ladder, garden hose, spray bottle, and chlorine bleach. Most homeowners already have those supplies.

If the moss is thick and well established on your roof, like the photo below, you should hire a professional.

The cost depends on the size of your roof, the amount of moss, and the labor rates in your area.

According to, roof cleaning can cost between $250 and $1000, with an average cost of $550.

As a rule of thumb, professionally removing moss will cost about 5% of what it would take to replace your roof altogether.

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Leads To Holes And Leaks In Your Roof

Sometimes you might not notice that moss has already invaded your roof. When you realize it has caused shingles to shift, you already have holes and leaks in your roof.

Also, the moisture held by mold may condense and then leak through your roof. You can catch this issue early through routine maintenance.

Different Types Of Moss

Despite the fact that there are several kinds of moss species all over the world, there are three main varieties that often creep up on our houses. Over time, our experts have been able to differentiate between these three categories.

Roly-Poly Moss

This is a type of pervasive moss that can actually remove the shingles from their mastic strips. They often sprout at the extremities of your tiles, shake, and shingles. You can spot these ones by their vivid green hue or the fact that they occasionally seem to sparkle.

Spindly Moss

This one is more difficult to see, as it tends to embed itself into a shingle. Once its settled, it begins to erode the tile. This kind of moss is a particular nuisance because you often dont know its there until your shingles start to fall apart.

Furry Moss

Youll find furry moss mostly on wood roofs, but you will sometimes see it on a roof tile. Its distinctive in that it typically has leaves sprouting alongside it. This moss is also a clear indicator that your roof has wet rot, as it only tends to grow on damp wood.

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How To Prevent Moss From Growing On Your Roof

Prevention is always the best weapon, but unfortunately, hindsight is 20/20. If the moss on your roof has already grown into a small lawn, these tips are still helpful in ensuring you prevent any regrowth.

  • If there are trees that overlook your house, consider trimming the branches that hover over your roof to prevent moss from growing.

  • Make sure you do routine roof cleaning. To maintain your overall roof health, clean your roof 1-2 times a year. It will ensure your roof is clear of debris leaves and sticks. Clean Break Home Services offers complete professional roof cleaning in Vancouver to help lengthen the lifespan of your roof.

  • Clean your gutters. Debris can clog your gutters and begin to mold. This moist environment can further speed up the development of moss as well.

  • Use zinc strips to prevent moss by nailing it along the peak of your roof. After a downfall of rain, the zinc gets released onto your roof and inhibits moss from growing.

The Best Way To Remove Moss From Your Roof: Hire A Roofing Contractor

Do you have Moss on your Roof?

In the end, the best way to remove moss from your roof is to hire an experienced roofing contractor. Seattle-area roofers are very good at removing moss. We do it all the time! Only a professional will be able to get rid of all the moss, apply preventative measures, and do it all without making you climb up on the dangerous roof.

If you want to get rid of the moss and algae on your roof,contact the experts at Cloise & Mike Construction today. Well give you a free estimate for the job and be able to handle any repairs you might need. No matter your roofing need, were here to help!

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Practical Things You Can Do To Help With Your Moss Problem

These are progressive times, so the method you choose to apply should not cause harm to the environment. So harsh chemicals are out of the question. You can:

  • Prune the trees and branches around your home
  • Unclog and clean your gutters to eliminate moisture that harbors moss growth
  • Schedule regular roof inspection to spot early moss growth
  • Applying a water-based zinc treatment on the roof
  • Using copper treatments which additionally keeps pests and insects off your roof

Unless there is severe damage to your roof, you dont need to replace it because of moss. Your roof could only be missing out on the action from the sun, which you could easily remedy.

Understanding the climate you live in could also help you prepare to deal with moss. Refrain from pressure washing or using home cleaning products to remove moss from your roof. Something like pressure washing could drive moisture deeper.

Why Is Moss Bad For Shingles

You may feel that a bit of moss gives your roof some charm, just as ivy growing up the side of your house might. While moss may be beautiful, it is a detriment to your roof. Heres why:

Most plants gather water from their roots, but mosses gather water from their leaves. Therefore, they do not mind that shingles, unlike soil, are a dry and relatively nutrient-free environment. They will grow roots directly into the shingles, which can destroy the shingles and create the opportunity for leaks.

When it rains, moss will soak up water and retain it, creating consistently wet conditions on your roof. Moss growth will also interfere with proper drainage of water off the roof as water needs to trickle through or around the moss instead of running straight down to the gutters. The resulting constant exposure to water can degrade shingles.

Over time, moss can also work its way under shingles, lifting them up. This uplift creates opportunities for water to penetrate lower layers of the roof and, potentially, your home.

While minor moss infections may not cause many issues, it is likely to become severe over time. Once you spot moss growth on your roof, you should take steps to resolve it. If you have a severe infection, you may have no choice but to remove the shingles that have been damaged by it. A professional roofer can help you assess what kind of intervention your roof needs.

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Why Shouldnt I Add A New Roof Over Moss

When you need a new roof, it may be tempting to add a second layer of shingles over your existing shingles. Doubling up your shingles can save time and expense on your roof replacement as your roofer doesnt need to remove and dispose of the old shingles. This strategy is convenient for homeowners because the replacement wont take as long or make as much of a mess. However, there are some circumstances where merely adding a new layer of shingles isnt a good idea.

For example, when you have significant moss growth on your roof, simply covering it up with new shingles isnt wise. Several potential problems may occur if your roofer simply adds a new roof over your existing, moss-covered roof. These potential problems include:

So Is Moss Bad For Your Roof

Roof Cleaning Connecticut Soft Wash Cleaning Professional

Yes. 100% all moss, even if it’s a small patch or the width of a lawn, it can create irreparable damage to your roof if left untreated. This type of destruction can cost you hundreds or even thousands of dollars in roof replacement. But don’t fret, you may not need to get an entire new roof just yet.

Get a free assessment to see if your roof simply needs a good cleaning. If you’re lucky, you might’ve detected your moss growth early and have time to tackle the issue before it worsens.

Before you hit the point of no return, consider Clean Break Home Services, we offer moss removal and roof cleaning in Vancouver, along with other professional cleaning services for your home’s exterior.

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Finally A Note On Safety

Cleaning a roof requires specialist equipment. If you do not have the right kind of ladders, safety harnesses or anchors, do not attempt to work on your own roof.

If you are not sure how to clean a roof safely, or what kind of roofing supplies you will need to fix damaged tiles or slates, then you should seek professional help. Working at a height is dangerous, and if you damage your roof it could be expensive to repair it. If damage to tiles or shingles goes undetected, you could end up with a problem that affects other parts of your home.

The chemicals used to remove moss from roofs can be harmful to plants and small animals. If you do choose to clean your roof with chemicals, cover large plants with a waterproof sheet before starting, and soak the root areas around any shrubs and trees before and after the cleaning process, to minimise any damage to the plants.

How We Remove Moss Without Damaging Shingles

Of course, if you already have moss on your roof, the best place to start is with a thorough roof cleaning and moss removal. Weve developed a 3-step process designed to remove moss without damaging your roof! Heres how:

  • We start by gently brushing away moss by hand, freeing it from your shingles.
  • Using compressed air, we blow the loosened moss and debris off of your roof. We get every nook and cranny, even the hard-to-reach-spaces between shingles.
  • Finally, we clean up the debris and make sure youre happy with how your roof looks.
  • Do you want to maximize the life of your roof? A moss prevention treatment applied to a clean roof is a great way to protect your home!

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    How Do Moss And Algae Develop On Roofs

    Moss and algae both develop on roofs in Arizona as a result of damp conditions. Even if you live in a sunny area like Phoenix, monsoon moisture can cause problems. If you have trees overhanging your roof, the shaded areas tend to stay moist longer. Shade is great, but the cool and moist area that results from the evaporative effect in the shade during monsoon time encourages moss and algae growth. Wind can carry the spores to other areas of the roof as well.

    Can Moss Cause Roof Leaks

    How to Clean and Prevent a Mossy Roof | Ask This Old House

    By Cassie Findley

    You wouldnt think that something as natural and lightweight as moss would cause roof leaks, but it absolutely can. Depending on your region, some roofs can have more moss growth than others. Certainly, if your house is near or under a lot of trees and has a wet or tropical climate, youre at risk for abundant moss growth.

    Okay, whats so bad about moss? Moss is kind of like a sponge in the sense that it absorbs water. If you have moss on your roof, its collecting water every time it rains and in turn, weighing down your roof and affecting its infrastructure. Not to mention, this can severely damage your shingles and other roofing materials.

    RoofCrafters has been repairing roof leaks caused by moss for nearly 30 years, so we know how evil these green balls of fury can be. We also know all the ways you can prevent these fuzzy guys from wreaking havoc on your roof.

    That being said, its probably safe to say youve recently had some roof damage caused by moss if youre reading this article. Or, youre just intrigued by moss. To each their own, right? Either way, youre in the right place. In this article, youll learn all about the seriousness of moss-related roof leaks, and how to prevent them from happening in the first place.

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    Why Moss On Your Roof Is Bad And What You Need To Do About It

    by Admin | Dec 21, 2021 | Blog, roof cleaning, Roof Repair, Roof Replacement, Roofing |

    Moss is an annoying four-letter word for homeowners. It does nothing else well for a roof but a hobbit-like feel. It is not only a cosmetic issue but can cause serious problems that can reduce the life of your roof. So, if youve sprouted a moss infection, you should remove it physically and look for ways to prevent its growth before it becomes a serious threat to the performance.

    Heres everything you need to know about moss on the roof:

    Is Roof Cleaning An Easy Do

    When it comes to roof cleaning, theres nothing fast or easy about it. It can be quite dangerous and you may risk the chance of injury. If you want to clean your roof safely and effectively then you definitely need to have a clear game plan with smart safety procedures. Most important, take your time because to rush through a roof cleaning will lead to trouble. A wise recommendation is to find a qualified, pressure roof cleaning company in your area. Here in Seattle, Guardian Roofing has all the equipment and experience to clean your roof in just a few hours. Why risk your life? If you are looking for a roof cleaning contractor here in Seattle, please call us today at 877-926-9966 or complete our online service request form.

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    Why Does Moss Grow On Roof Shingles & Is It Bad

    We associate picturesque cottages with moss-lined roofs as being dream-like and straight out of a fairytale. But in reality, this green build-up has more of a nightmarish quality to it. Letting moss grow freely across your shingles can put your home, building, or other structure at risk. In this article, we will discuss how moss develops on your roof, why its harmful, and how to get rid of it.

    How Do I Apply Moss Remover

    Moss on a roof top  JSPEC Roofing

    Firstly, you should only apply roof cleaning or sealing products on a clear, but cool day with little wind. This is because excessive heat can cause the solution to evaporate too quickly to have an effect, and wind can blow it off your roof tiles. You should also take care to protect any plant life nearby from the chemicals using plastic sheeting, and hose them down afterwards to ensure no damage.

    To apply the moss remover, work backwards on your roof applying a gentle coat using your garden sprayer. This is not only the most efficient way to work, but youll also be keeping yourself safe by never stepping onto a wet, slippery tile. Once this initial coat has been applied, simply wait for it to dry and then gently brush away any remaining debris.

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