How To Find & Remove Mold On Your Roof | Roof Troopers
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How To Find & Remove Mold on your Roof

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Posted By: Roof Troopers

mold on the roof dealing with mold issues

Mold on the roof can pose a serious risk to you and your home. Left untreated, it can cause extensive property or roof damage. It can also lead to numerous health complications and make any space look unsightly. 

Given that, you need to know how to find and remove mold on your roof. In this article, we’ll look at the underlying factors of mold on roofs, prevention methods to halt its growth, and solutions for existing issues. 

What Is Mold?

mold on the roof figuring out what is mold

Mold is a fungus that can sprout on numerous substrates, including rooftops. It thrives in damp and humid areas, making the roof an ideal breeding ground for mold growth. To prevent growth on your roof, it’s essential to understand what causes it and how to address these issues.

Reasons for Mold Development

Moisture, direct sunlight, and humid summers can create an environment that offers perfect conditions for a moldy roof. Moss, algae (blue-green algae), and mold will take advantage of these conditions. 

Moisture Buildup

Moisture buildup is one of the most common causes of roof mold. Any area where standing water can accumulate or pool up on your roof is a perfect environment for mold growth. 

Typical triggers include clogged gutters, downspouts that don’t correctly direct water away from the house, and poor drainage.

Poor Ventilation

mold on the roof maintaining best ventilation

Poor ventilation can also lead to moisture buildup and mold growth on your roof. Warm air will become trapped inside without proper airflow throughout your attic space. That increases humidity levels and creates an ideal environment for mold spores. 

Leaks and Cracks in the Roof

Unfortunately, roofs are highly vulnerable to leaks. Fractures in your roofing can let rainwater enter the attic, inevitably resulting in mold if not addressed immediately.

Prevention Strategies for Roof Mold

There are several strategies for preventing roof mold.

Keep Your Gutters Clean

mold on the roof cleaning gutters

Gutters need to be regularly cleaned to prevent mold. To properly clean your gutters, there are a few steps to take:

  • Put on gloves and safety glasses
  • Scoop out debris from the bottom of the gutter
  • Use a hose to flush debris from the gutter
  • Remove any stubborn material from the gutter with a high-pressure sprayer 

Repair Any Damage

Regular roof inspection is a must, as it’s vital to spot any damage to your roof, such as broken shingles or missing tiles, early on. One option is to use asphalt shingles equipped with advanced algae growth-resistant technology. 

If you can’t repair the damage yourself, seek professional help like Roof Troopers to get it done right.

Ensure Adequate Ventilation

Your home needs to be properly ventilated to prevent moisture from building up and creating an ideal environment for roof algae or mold.

To ensure your home has adequate ventilation, open windows or install vent fans in your attic and other damp areas.

Install a Roof Shield 

A roof shield is a secondary layer of protection that helps protect against water damage and potential mold growth. The best roof shields are breathable, water-resistant, and can be installed under your shingles.

Clean Your Roof Regularly 

Inspect your roof for signs of mold, mildew, and green mossy growth. Use a brush and bleach-water solution to clean it off if you find any. In addition, remove leaves and tree branches. You’ll also want to trim trees that are close to your property.

Remedies for Existing Roof Mold

Once visible growth is detected, it’s essential to take the necessary steps to stop roof algae and remove or remediate existing mold. A few strategies for tackling existing mold growth include:

Pressure Wash the Roof Surface

The most common initial step is to pressure wash the affected area with a mild detergent and water solution. That will help to remove much of the existing mold.

Use Fungicides

Fungicides can combat growth and guard against further problems. It’s essential to choose a fungicide that is specifically designed for roofing applications.

Remove and Replace Affected Materials

mold on the roof removing shingles

In some cases, the best strategy is to remove and replace the material affected by mold and wet algae growth. If this is not possible, it may be necessary to use a sealant to cover the area.

Install Ventilation

If moisture is an issue, installing proper exhaust fans in the attic or other high-moisture home areas is essential. That will keep moisture levels in check, reducing the chances of mold growth.

Clean Regularly

Regular cleaning and maintenance can help you prevent algae and mold from gaining a hold on your home’s roof. With that in mind, clear out the gutters and look for leaky areas contributing to mold growth.


Do you have more questions about removing mold from your roof? Keep reading because we have the answers to four of the most commonly asked.

How do I get rid of mold on my roof?

The first step is to identify the source of moisture, such as poor ventilation or inadequate roofing materials. Once identified, steps should be taken to reduce and eliminate this moisture source. 

Afterward, use a pressure washer with a cleaning solution to remove algae and mold from roofs and other surfaces.

Can mold on the roof make you sick?

mold on the roof can molds make me sick

Mold on the roof can put your health at risk. In fact, mold and mildew growth or exposure are associated with several illnesses. Symptoms include headaches, respiratory distress, allergy flare-ups, skin irritation, and sometimes even asthma attacks. 

What does mold cause?

Mold causes wood rot in roof shingles, structural damage, and can lead to health issues due to the release of airborne spores.

Is mold on the roof a problem?

Yes, mold on the roof can be a problem. Mold growth is caused by moisture and warm temperatures, ordinary in roofs. If left untreated, mold can cause structural damage to your roof and create health hazards for those living or working in the building. 


Mold on the roof can lead to structural damage and health issues. Unfortunately, many homeowners don’t take the necessary steps to deal with this hazard. 

If you’re unsure about what next steps should be taken regarding your own home’s safety from potential mold growth, contact Roof Troopers today to get advice from an experienced roofing contractor! Together, we’ll ensure your home remains safe and secure for years.


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