How to Prevent Moss and Algae Growth on Your Roof
April 2, 2025

Moss and algae might seem like minor nuisances, but they can cause serious damage to your roof over time. Moss absorbs moisture, which can lead to wood rot and shingle deterioration, while algae create unsightly black streaks that can reduce your home’s curb appeal. Both can also contribute to premature roof aging, leading to costly roof repairs or replacements.

Keep Your Roof Clean and Dry

The best way to prevent moss and algae growth is to create an environment where they can’t thrive. Here’s what you can do:


  • Trim overhanging tree branches to allow more sunlight to reach your roof and reduce moisture buildup.
  • Clear leaves, twigs, and other debris from your roof and gutters to prevent trapped moisture.
  • Inspect your roof regularly for signs of moss or algae so you can address small issues before they become major problems.

Improve Roof Drainage

Excess moisture is a key factor in moss and algae growth. Keeping water flowing properly off your roof can help minimize the risk.


  • Clean your gutters and downspouts regularly to prevent water from pooling on your roof.
  • Check for clogs and repair misaligned gutters that may be trapping moisture along the roofline.
  • Consider installing a roof ridge vent to improve ventilation and reduce humidity levels in your attic.

Use Preventative Treatments

If your roof has a history of moss and algae growth, a preventative treatment can help keep it under control. There are a few ways to do this:


  • Install zinc or copper strips along the roof’s peak. When it rains, metal particles wash down and inhibit moss and algae growth.
  • Apply a specialized roof treatment designed to prevent moss and algae. These solutions are available from professional roofing companies and can help protect your shingles.
  • Choose algae-resistant shingles if you’re replacing your roof. These shingles contain granules that prevent algae growth over time.

Schedule Professional Roof Maintenance

Regular roof maintenance is key to preventing moss and algae from taking over. A professional roofing company can safely remove any existing growth and apply protective treatments to extend the life of your roof.


If you’re dealing with moss and algae on your roof in Missoula, MT, we can help. At A&B Roofing, we provide expert roof maintenance and treatments to keep your home protected. Contact us today to schedule a roof inspection and keep your roof in top shape year-round.

Author Details

Denise Haycook

Co-Owner


Denise Haycook, with her extensive experience of more than 10 years, is the proud co-owner of A&B Roofing.

June 3, 2025
Choosing new roof shingles isn’t just about durability—it’s a chance to elevate the overall look of your home. The right shingle style can complement your exterior, boost curb appeal, and even add value to your property. With so many colors, textures, and materials available today, making the right choice can feel overwhelming. Narrow it down with these tips from our roof construction and replacement pros.
June 2, 2025
A roof inspection might not be something you think about often, but it plays a key role in keeping your home safe and dry. Whether you’re dealing with a potential issue or just scheduling routine maintenance, knowing what to expect during an inspection helps you stay informed and confident throughout the process.
May 3, 2025
Before installing solar panels, one of the most important factors to consider is your roof’s load capacity. Not every roof is automatically ready to support the additional weight of a full solar array. If your roof isn’t built to carry the extra load, you could be looking at serious structural problems down the road.
March 1, 2025
Keeping your roof clean isn’t just about curb appeal—it helps protect your home from damage, extends the lifespan of your shingles, and prevents costly repairs. Over time, moss, algae, dirt, and debris can build up, leading to issues like water damage and deterioration. Understanding the best practices and products for roof cleaning can help you maintain a sturdy, long-lasting roof. Just keep in mind that you should never to onto your roof, as this is dangerous. All cleaning should be done from upper-story windows or from the ground. For the rest of the job, hire a professional roofing team .
February 3, 2025
Homeowners looking to make energy-efficient upgrades often overlook one of the largest parts of their home: the roof. The right roofing materials can contribute to energy savings and may even qualify you for tax credits. If you’re wondering whether your roof upgrade makes the cut, here’s what you need to know.
January 1, 2025
Your roof is one of the most critical parts of your home, protecting its structure and keeping you and your family safe from the elements year-round. If you’ve noticed signs of wear, such as leaks, missing shingles, or sagging areas, it might be time to replace it. But timing is everything when planning a roof replacement . Choosing the right season can help ensure the process goes smoothly and efficiently.
December 1, 2024
Your roof protects your home and family, so you want a team you can trust to get the job done right. We can get some intense weather here in Montana, so you need a roof that can withstand those extremes. To help you make an informed decision, here are the key factors to consider when hiring a roofing contractor in Missoula.
November 1, 2024
Choosing the right roofing material for your Montana home is crucial, given our occasionally harsh weather conditions. From heavy snow in winter to hot sunny summers, your roof needs to withstand the elements while providing long-term protection. Let’s explore the pros and cons of each of the top roofing materials for Montana’s climate.
October 4, 2024
Deciding between a roof repair and a full roof replacement can feel overwhelming. Knowing the difference and what signs to look for will help you make an informed decision. Whether it’s a few missing shingles or more extensive damage, understanding your roof’s condition is crucial to protecting your home.
September 5, 2024
As winter approaches in Missoula, ensuring your roof is ready to withstand harsh weather conditions is crucial. Proper preparation can prevent costly damage and extend the life of your roof. Here’s how you can prepare your roof for the cold months ahead.
Show More