How to Treat Moss on Roof Tiles - A Complete Guide

moss on roof tiles

Do you have a north-facing roof? You must be facing a moss growth problem with your roof. The north-facing roofs are usually exposed to mold growth due to little sunlight. Moss can quickly grow in the damp and dark areas. It can grow between the roof tiles, filling in the voids that result in roof damage and shortening its lifespan. Moss on roof tiles results in costly repairs, and untreated moss can even lead to roof replacement. A thin layer of moss is not troublesome, but having clumps of moss can be quite dangerous for the roof tiles. 

However, moss usually starts as a thin layer and gradually lifts the shingles or tiles as it grows. It allows the water to seep underneath and start leaking. If left untreated, moss can cause the roofing material to degrade and shorten its lifespan. It is better to treat it at the right time before the problem is unable to be resolved. 

Removing and preventing moss is a simple task that could be performed via DIY methods. In this post, you will find how you can treat and prevent moss on roof tiles. Continue reading to make the most of this post. 

P.S. If you need the help of professionals and can't do it yourself, find them on HighFive Listings. You can search for roofers here in your area. Moreover, don't forget to check out our blog that contains questions you must ask roofing contractors before hiring any.

What Are the Causes of Moss Growth?

The roof, shaded and exposed to damp and cool weather conditions, is prone to grow moss. Little sunlight can cause the moss to grow on the roof tiles. When cool, moist and shade combines, it leads to the moss and lichens to grow on the roof tiles. Moss can grow on any roofing material, whether metal, wood, or concrete. Besides, it is more than a cosmetic issue. Untreated moss on roof tiles can lead to serious issues that are sometimes unable to cure and demand roof replacement.

How to Remove Moss From A Roof?

Moss on the roof tiles is not hard to remove if you detect it in the early stages. However, the worst moss condition should only be treated by hiring experts and avail of residential roofing services. You can remove moss with simple DIY steps. 

Materials You Need

  • Safety glasses
  • Ladder
  • Rubber gloves
  • Safety rope
  • Garbage bag
  • Garden hose with a spray nozzle
  • Moss remover
  • Scrub brush
  • Long-handled brush
  • Power washer

Step 1: Prepare Everything

First things first, you need to prepare yourself for moss removal. You will get dirty while performing this task. Therefore, wear old clothes, slip-resistant shoes, gloves, a cap, and glasses. Besides, cover everything around the roof and cover the nearby plants so that moss does not get there. Now, set the ladder, take the garden hose, and start climbing the ladder.  

Step 2: Spray Roof with Water

The next step to remove moss on roof tiles is to spray the area with water using the garden hose. Make sure to start from the top so that the water pours off the entire tire. Besides, it will prevent the tiles from lifting with water. 

Step 3: Scrub It

Before you apply the moss remover, you should gently scrape the moss from the tiles. You can use a brush to do this. Make sure to work on small sections at a time. Do not be too hard to prevent the tiles from breaking. 

Step 4: Remove Moss

Now, it is time to apply the moss remover to remove moss. You can use any remover. Use a large spray bottle or pump sprayer to apply the moss remover. Make sure to let the remover sit for a certain amount of time suggested by the manufacturer. However, if you are using a home-made moss remover, ensure to let it sit for at least 20 minutes. 

Step 5: Rinse Roof

After the remover is set for some time, it is time to rinse the roof. Climb again up the ladder while grabbing the garden hose. Rinse off the moss remover and dead moss. Remove all the moss from the roof and put that in the garbage bag. Once done, again, rinse the roof for better results.

Moss-Remover Methods to Avoid

Roofing materials can get damaged if not treated in the right way while removing moss. Here are the methods you should not adopt while removing the moss:

1) Scrubbing:

It may look tempting, but it can highly damage the materials like asphalt shingles and tiles.

2) Pressure Washing:

It is a strong method to remove the moss, and it is not recommended because it can damage the roofing material causing the tiles to pull away from the roof.

3) Harsh Chemicals:

Harsh chemicals can cause roofing material to damage, resulting in leaks. Make sure not to use such chemicals like bleach, etc. 

How to Prevent Moss on Roof Tiles?

Fortunately, there are several preventive measures to keep your roof moss-free. You can ask your tile roof installers to use these measures while providing you with residential roofing services. Here is what you can do to prevent moss on your roof:

  • Install copper or zinc ridges to the roof. In the case of rainwater falling on the ridges, the residue will release, which is a perfect way to prevent moss growth. This copper residue runs down the roof and discourages the moss from growing.
  • Keep the gutters clean from debris, dust, and dirt. 
  • Regularly remove the leaves, branches, and seed pods that can pile on the roof tiles, which are highly favorable for moss growth. 
  • Trim the branches of the trees that overhang on the roof.
  • Get your roof inspected for water damage regularly.
  • Wash your roof once or twice a year to clean and prevent it from moss. Make sure not to use damaging pressure washers. 


Roof installation is a huge investment. If you want to secure your investment, you need to prevent it from everything that can cause damage. Moss growth is dangerous for a roof, and it can shorten its lifespan. However, you can tackle the moss growth on your roof. Make sure to be aware of the dangers associated with the roofing job. Make sure to hire experts if you are unable to treat moss on your roof tile. 

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