How can I remove moss from my roof?

How can I remove moss from my roof?

How can I remove moss from my roof?

Seeing this green, fuzzy growth on your roof is rarely a pleasant sight. With nearly 12 million results on google for this question, it is certainly a very common problem for many in the UK. But, what is the best way to remove moss from your roof?

There are many different products and methods out there, but in this article, we will be discussing the best ones to use and where you can buy them. We also offer a moss removal service.

What is the best way to remove moss from a roof?

If you plan to remove the moss from your roof yourself, we would suggest using sodium hypochlorite. Why is that? It is by far the best DIY way to remove moss from your roof. It is inexpensive, easy to use, fast-acting, and efficient. 

You may need to purchase a sprayer to apply the sodium hypochlorite as evenly as possible.

When it comes to cleaning moss off of your roof, never use a jet wash or high pressurised water to rinse and clean your roof. This is because the jet wash will damage your roof tiles or slates and cause more harm than good. It will remove the protective layer from the roof that will require major repairs in the long run.

Instead, you can use soft wash techniques, whether machine or otherwise. This gently rinses the roof whilst protecting it. If you don’t have a soft wash machine, a hose and a stiff brush will do the job.  Most roof moss removal chemicals take 15-20 minutes to work. 

You might want to make sure the surroundings of your roof are protected from the chemicals. You may also need to clean out your gutters after and make sure they are not blocked with moss and other debris. It will not damage concrete.

If you would rather not go through the hassle of cleaning your own roof, feel free to contact a roof cleaner local to you and ask for a quote for your roof.

Before Image After Image

What is sodium hypochlorite?

It is a disinfecting agent used for killing fungi, bacteria, viruses, and mycobacterium. It is completely safe to be used on roofs, though, when using it make sure to take safety measures such as using gloves and keeping it away from children, pets, and plants. It can be diluted with water when used on roofs.  

Most professional roof cleaners out there today use a mixture of sodium hypochlorite when dealing with roof cleaning jobs that require a great deal of moss removal.

Although it can kill moss and algae, it cannot remove black stains such as lichen, mould, and mildew.

Below are many frequently asked questions about removing moss from your roof. For example, why does moss grow and how can you prevent it, what are some natural ways to remove moss from your roof if you don’t want to use chemicals, and when is the best time to remove the moss on your roof.

Sodium Hypochlorite 14-15% Concentrated Solution

Sodium Hypochlorite patio cleaner is the quick and easy long-term solution to cleaning and removing moss, algae, and weeds from your drive, patio, walls, fences, and brickwork. Used as a patio cleaner is known as the product to use, and is commonly found in dilution in various other versions of patio cleaners. The solution we have available is highly concentrated and will remove the need for numerous applications, one treatment will provide a clean and moss-free surface immediately. Available on Amazon would you believe!! Click here

Why do I have moss on my roof?

You may have more moss on the part of your roof that faces north. Why? North facing roofs usually receive much less sunlight that the rest of your roof. Less sunlight means more moss build-up on your roof. 

Should I remove moss from my roof?

Moss grows quickly and can get between roof tiles. As it grows, even more, it can potentially lift up the roof tile, causing a breach in your roof. Eventually, rainwater will begin to make its way into your roof and cause water damage. This can also be a safety hazard if the tile becomes loose and falls off. 

Water damage can cause a number of issues in a home including mould, mildew, and dampness. It can also rot and decay parts of your home, especially wood.

So, we would say it is best to get the moss from your roof removed sooner rather than later. The cost of removing moss roof doesn’t even compare with the cost of getting your roof repaired or replaced.

What to do if moss is growing on your roof?

There is a lot you can do. You can either choose to do it yourself. Purchasing sodium hypochlorite. Although this can be hazardous if your roof is high up and difficult to access. If that is the case, you can easily get in contact with your local roof cleaner and request a quote. Different roof cleaners use different methods. This may depend on the type of roof you have.

What kills moss naturally?

There aren’t many products out there for natural moss removal, but you can always use a home remedy instead. For example, vinegar or baking soda will do the trick.

When should I treat my roof for moss?

The best time to clean your roof is on a cloudy day. This is because applying sodium hypochlorite on a roof on a hot and sunny day will cause the treatment to evaporate and not be able to do what it is designed to do. The results will be lacking and you will have to do it again on an overcast day.

The best time to treat your roof with sodium hypochlorite is just before the moss begins to grow again in spring. Late winter/early spring is the time recommended. It’s best to kill the moss as early as possible before it grows even more

Does the moss on your roof die in winter?

Surprisingly, moss thrives in winter. A cold, damp, and dark environment are perfect for moss. However, when summer comes, it brings a hot sun that dries moss out and kills it. Dead moss on your roof will turn brown and look somewhat unattractive. No wonder requests for roof cleaning are so popular in summer. 

The good news is that dead summer moss is much easier to remove than strong, healthy, alive winter moss. Though, you may expect it just to all dry up and fall off your roof on a particularly windy summer day. However, we’d recommend getting your roof cleaned professionally, either by yourself or by hiring a company. You can use sodium hypochlorite to effectively kill off any alive moss, and softwash it away. This will leave you roof sparkling, looking its best for the summer, and free from moss for a time. 

How much does it cost to remove moss from your roof?

The price to get your roof professionally cleaned will depend entirely on the size of your roof. Also, accessibility, type of roof, and whether you want it cleaned and treated, or just cleaned. Average roofs will cost around £400-£700 to clean and treat. 

How do you stop moss from growing on your roof?

As we have discussed, it is important to remove any moss that grows on your roof, as it can affect your roof in many ways. But, after you have removed it, is there any way to prevent it from growing back? Or, at least slow down the process? Yes. There are a number of steps you can take. 

After you have cleaned your roof, or have had it professionally cleaned, you want to make sure you get it treated with an anti-moss biocide, or with sodium hypochlorite. This will not only kill existing moss, but it can prevent moss from growing in the future. Leaving this treatment on your roof will keep it clean and moss-free. 

Moss spreads by releasing spores. These spores will settle well on cool, damp, dark places. So, do all you can to make your roof as dry and exposed to do sun as possible. One way you can do that is by removing overhanging tree branches.

Another step you can take in preventing moss growth on your roof is cutting back overhanging trees if possible. Trees with branches that hang above or near your roof can cause a great deal of moss to grow. They provide shade from the hot sun, and years of falling debris can cause an optimum environment for moss to thrive. Dead leaves, twigs, dirt, and other things dropped by birds can build-up on your roof. So trimming overhanging branches regularly can make all the difference in stopping moss from growing. 

A big issue when it comes to moss on the roof is blocked gutters. The gutters on your roof provide an escape from water when it rains. If your roof gutters are blocked, however, water can build up and create a damp and cool environment that invites moss to grow. Make sure you check often whether your gutters are doing their job, and get them cleared out and unblocked as soon as you start seeing debris build-up.

We would not recommend using anti-moss strips as the installation process can do more damage to your roof than any moss growth. As long as you regularly maintain your roof and its surroundings, it should last a very long time.

Read next: What’s the best pressure washer to buy for home use?