How to Remove Moss and Other Debris from Your Roof

Moss, lichen, and algae are commonly found on roofs in various areas around Oklahoma. Rainy weather and humidity encourage their growth and can cause them to accumulate on your roof.

While moss and algae may seem like a minor problem to have, they can actually cause issues and damage to your roof that can compromise its integrity. In this post, we’ll give you steps for how to remove moss and algae from your roof. We’ll also touch on why moss and algae are bad for roofs and detail what not to do when removing them. Keep reading to learn how to keep your roof moss and algae-free.

Are Moss and Algae Bad for Your Roof?

In short - yes. Any debris or object sitting on your roof has the potential to become an issue. Moss, lichen, and algae in particular cause problems because they tend to accumulate moisture. This can lead to a few different issues, including:

1. Moisture Retention: Moss, lichen, and algae retain moisture, which can cause the underlying roofing materials to deteriorate faster. This can lead to rot and weakening of the roof structure.
2. Structural Damage: The roots of moss can penetrate roofing materials, causing cracks and lifting shingles. Over time, this can lead to leaks and significant damage.
3. Reduced Lifespan: The presence of moss and algae can significantly reduce the lifespan of your roof by accelerating the wear and tear of roofing materials.
4. Aesthetic Issues: Moss and algae growth can make your roof look unsightly, which can affect the overall curb appeal of your home or business.

How to Remove Moss and Algae from Your Roof

Some spots can be removed with proper safety precautions. The steps below are for reaching moss and algae that do not require you to go atop your roof. If you have excessive growth of moss and algae or it is present in hard-to-reach areas, always call a professional.

1. Safety First: Wear gloves and proper clothing like closed-toe shoes and long sleeves. If you must use a ladder, ensure it is stable and positioned properly. It is always best to have someone present to hold the ladder and ensure you are stable.
2. Inspect the Roof: Before you begin, inspect for any signs of further damage or weak spots on your roof. If you identify a need for repair, call a roofing company before attempting to clean your roof.
3. Remove Loose Debris: Use a soft-bristled broom or leaf blower to remove loose debris such as leaves, twigs, and loose moss. Be gentle to avoid damaging the shingles.
4. Apply Cleaning Solution: Use a pre-mixed moss remover or use a mixture of bleach and water as a cleaning solution. Spray the solution and let it sit for 15-20 minutes to kill the moss and algae. If you use a pre-mixed cleaning solution, carefully follow the instructions on the package.
5. Gently Scrub the Roof: Use a soft-bristled brush or broom to scrub the moss, lichen, and algae gently. Avoid using heavy for or a pressure washer, these can damage your roof.
6. Rinse the Roof: Rinse the area thoroughly with a garden hose to remove the cleaning solution and mos. Rinse from the top down to prevent water from getting under your shingles.
7. Prevent Future Growth: Trim any overhanging branches and remove any debris from your roof regularly. You can also consider contracting your roofing company to have copper or zinc strips installed on your roof. They help prevent the growth of moss, lichen, and algae.

What Not to Do When Removing Moss, Lichen, and Algae from Your Roof

1. Do Not Use a Pressure Washer: Pressure washers can strip granules from your shingles, cause them to lift, and damage your roof.
2. Do Not Use Harsh Chemicals: Harsh chemicals can compromise the integrity of your shingles and cause them to deteriorate quickly.
3. Don’t Ignore Safety: Always prioritize safety. When in doubt, hire a roofing company to inspect and clean your roof. Use protective gear and ensure ladder stability.
4. Avoid Over-Scrubbing: Scrubbing too hard can damage your shingles just as a pressure washer can. Be gentle and use soft-bristles tools.

When to Call a Professional for Roof Cleaning

When preparing to clean moss, algae, and lichen from your roof, there are a few key signs that you should contact a roofing company before proceeding.

Extensive Growth of Lichen, Algae, or Moss

If your roof is covered in thick patches of moss or lichen, you will likely need more help than just a DIY method. Extensive growth often indicates deeper problems with your roof. If this is your case, you should schedule a full-scale roof inspection before attempting to clean the roof yourself.

Growth That is Hard to Reach

If you have growth that you are unable to reach without going atop your roof, call a professional. Roof work without proper safety equipment is dangerous and should only be handled by an experienced roofing company.

Visible Damage to Shingles

Cracking, curling, missing granules, and missing shingles are all signs that further damage exists on your roof beyond the growth of moss and algae. Your roof will need professional attention beyond the removal of the growth. Damaged shingles lead to leaks and further deterioration if not promptly repaired.

Leaks and Water Damage

Any existing signs of leaks and water damage like water spots on your ceiling or noticeable leaks indicate that lichen and algae removal are not the only issue. Leaks cause significant damage to your roof and home and must be repaired.

Sagging Roof

‍A sagging roof indicates structural damage and is a serious issue. If you notice any sagging areas, call a roofing company immediately for an inspection and repair. This issue in particular can pose a safety hazard, as a sagging roof is often at risk for collapse.

Previous Cleaning Attempts Have Failed

If you’ve tried to remove growth but the moss, lichen, or algae issue persists, it’s time to call the experts. Professional roofers have the tools and experience to effectively treat and prevent their growth.

Your Roof is Reaching the End of Its Lifespan

If your roof is older and reaching the end of its lifespan (typically 15-30 years for typical asphalt shingles), you should schedule an inspection. You may be overdue for a roof replacement, which can help quell your algae and moss problem with the installation of new shingles and materials.

Conclusion

If left untreated, moss, lichen, and algae can cause significant damage to your roof. By following these steps and taking preventive measures, you can maintain the integrity and appearance of your roof. Regular maintenance and inspection are key to keeping your roof moss and algae-free. Always prioritize safety and use gentle cleaning methods to protect your roofing materials. When in doubt, call a professional!

‍Statewide Roofing in Oklahoma can help you with all your roof-related needs, residential or commercial. Give us a call today or contact us to get the repairs, inspection, or other roofing services you need. Take a look at our portfolio for our example work, and learn more about financing options and frequently asked questions.