Moss on roof shingles is often a result of moisture accumulation, typically in shaded areas. It thrives in cool, damp environments and can affect various roofing materials. In this guide, we'll share how to remove moss from a shingle roof safely and effectively, based on professional expertise.

Why Do You Need to Remove Moss from Asphalt Shingles?

Preserving Your Roof's Lifespan: Why Moss Removal Matters

Regular moss removal helps extend the roof's lifespan and preserves its structural integrity.

Moisture Buildup and Potential Damage from Moss

Moss can retain moisture, potentially leading to the rotting of underlying materials such as sheathing and weakening of shingles.

Curb Appeal and Property Value Impact of Moss Growth

Moss growth can compromise the aesthetic appeal of the roof, diminishing curb appeal and potentially lowering property value.

The Necessary Equipment Needed to Remove Moss from Asphalt Roof Shingles

• Extension ladder: Use a ladder that extends beyond the roofline for safe access.
• Soft-bristled scrub brush: Use a soft brush to loosen moss and algae to avoid damaging the roof surface.
• Zinc Strip: The zinc strip would help prevent moss regrowth.
• Pump sprayer: A pump sprayer allows you to apply moss removal solutions.
• Moss Removal Solution: Prepare a solution of one-third gallon of bleach to one and a half gallons of water or purchase a commercial moss removal product.

Safety first: To prevent falls or exposure to chemicals remember to wear slip-resistant shoes, protective eyewear, waterproof gloves, and safety harnesses.

How to Remove Moss from Shingles in 7 Steps

1. Conducting a Roof Inspection Before Moss Removal

Inspect your roof for damage and consider hiring a professional roofing contractor to repair your roof before removing moss from your roof.

2. Safe Ladder Use and Fall Prevention Techniques

Place the ladder on stable, level ground. Wear rubber-soled shoes, gloves, and safety glasses, and consider using a harness for added security, especially on higher, steeply pitched sections. Be cautious on wet, moss-covered roofs.

3. Sweeping Away Loose Moss for Easier Removal 

Lightly sweep off the roof to remove the loose moss.

4. Installing Zinc Strips to Deter Future Moss Growth

After sweeping off most of the moss, install a zinc strip across the top of the roof. When rainwater hits the zinc, it carries particulates down the roof, killing moss, lichen, and mold.

To install zinc strips on asphalt shingles, place the strips along the roof ridge, securing them with galvanized nails under the shingles to prevent leaks. Ensure the strips are evenly spaced and extend slightly beyond the roof edge to allow rainwater to carry the zinc particles down the roof, effectively preventing moss growth without damaging the shingles.

5. Protecting Grass and Plants from Damage

Before and after applying a moss removal solution, water down the surrounding grass and plants to prevent chemicals from damaging your plants.

6. Applying the Moss Removal Solution

Use a pump sprayer to apply a bleach solution. While the recommended bleach solution (one-third gallon of bleach to one and a half gallons of water) can be effective, it's crucial to ensure it is safe for asphalt shingles to avoid potential damage. Consider using a commercial moss removal product specifically designed for roofs or dilute the bleach solution further to protect your shingles.

7. Waiting for the Result

It would take a few days for the moss to die. After a good rainstorm, the dead moss would wash away, leaving the roof in much better condition. The zinc strip would help prevent future moss growth.

Can You Use Power Washer to Remove Moss From Your Roof

Professional roofing contractors advise against using a power washer to remove moss from your roof, as it could be dangerous for a homeowner to walk on a slippery roof and damage the shingles.

Prevent Future Moss Growth After Removal

Sunlight Exposure: Trimming Overhanging Branches

Trim overhanging tree branches to increase sunlight exposure and reduce shade on the roof, which prevents moss growth.

Maintaining Clean Gutters and Downspouts for Proper Drainage

Clean gutters and downspouts regularly to prevent water buildup and improve roof drainage and ventilation, creating less favorable conditions for moss.

Using Copper or Zinc Roof Strips for Long-Term Prevention

Install copper or zinc strips along the roof peak to inhibit moss growth, as these metals release ions that deter moss and algae.

Regular Inspections and Moss Removal Touch-Ups

Conduct regular roof inspections and perform roof cleaning to remove any moss be fore it regrows, maintaining a moss-free roof surface.

Proper Attic Ventilation to Reduce Moisture Buildup

Ensure proper attic ventilation to reduce moisture buildup, creating an environment less conducive to moss growth.

Anti-Moss Roofing Coatings

• Copper-based coatings: Copper is naturally fungicidal and algicidal, hindering moss spore germination and growth.
• Zinc-based coatings: Zinc, like copper, prevents moss growth. Combining copper and zinc can offer broader protection.
• Silicone-based coatings: These coatings often have a micro-biocidal additive to discourage moss, while the biocide tackles existing spores and growth.

Important Note: It's important to be aware that there's a limited amount of independent research available on the long-term effectiveness and environmental impact of moss prevention coatings.

Hire a qualified roofing professional near you to inspect your roof and rec ommend suitable anti-moss solutions based on experience and available data.

When Should I Hire a Professional to Remove Moss from Asphalt Shingles?

Hiring Professionals for Severe Moss Infestations

It is best to hire a professional roofing contractor to remove moss from your roof if the removal process seems dangerous. 

Ensuring Safety with Professional Asphalt Roof Moss Removal

Professionals have the proper safety equipment and experience to clean moss from roofs thoroughly. They can also address any damage the moss may have caused, such as leaks or rot.

How Much Does it Cost to Remove Moss from Your Asphalt Roof?

The cost to remove moss from your roof by a professional contractor can vary depending on several factors, but here's a breakdown to give you an idea:

Cost Breakdown: Price per Square Foot of Roof

Professional moss removal typically costs between $0.20 and $0.70 per square foot.

Roof Size and Impact on Moss Removal Cost

The bigger your roof, the more it will cost to remove moss. An average American home has a roof size of around 1,700 square feet, so expect costs to be within that range multiplied by the price per square foot.

Accessibility and Additional Service Costs

If your roof is steep or requires scaffolding for safe access, the cost will likely be higher. Some companies may offer moss treatment to prevent regrowth, which would be an extra cost (typically $150-$250).

Example Cost for Professional Moss Removal on a Typical Roof

For a typical 1,700-square-foot roof with easy access and using a mid-range price per square foot of $0.40, professional moss removal might cost around $680.

Hire the Best Asphalt Shingle Moss Removal Contractors Near You on Directorii

Why Professional Moss Removal Can Be the Best Choice

Although the moss may seem harmless, its presence on your roof can lead to significant damage if not dealt with promptly. While DIY methods can work well with proper safety precautions and upkeep, using Directorii to hire a roofing contractor makes the process easy and safe. 

Peace of Mind with Our $20,000 Guarantee

We only list top-vetted roofing professionals near you, and we back every job registered on our platform with a $20,000 guarantee.

It is important to address moss on your roof promptly whether you choose to do it yourself or hire professionals. This can help preserve your roof's integrity and prevent expensive repairs. With the right knowledge, you can keep your roof free from moss for an extended period.