Skip to content

How to Remove Mold, Mildew, and Algae from Your Roof

Mold, mildew, and algae can significantly impact the appearance and longevity of your roof. These issues are particularly prevalent in warm, humid climates and can lead to further complications if not addressed promptly. Champion Restoration and Construction in Chantilly, VA, offers professional services to effectively remove these contaminants and protect your home. Champion Restoration and Construction ensures your roof remains clean and in top condition.

Identifying the Problem

Dark Streaks and Stains

Dark streaks and stains on your roof are typically caused by a blue-green alga known as Gloeocapsa Magma. This alga thrives in shady, damp areas, often appearing on northern-facing roofs. It can be transmitted through wind, water, birds, and other animals, settling into and spreading beneath asphalt shingles.

Professional Cleaning Recommendations

Safety First

While it might be tempting to tackle the cleaning yourself, we strongly advise against it due to the dangers of working on rooftops. Champion Restoration and Construction can safely and effectively remove any stains or streaks, ensuring your roof remains undamaged and your safety is not compromised.

DIY Cleaning Methods

If you decide to clean the roof yourself, it is crucial to completely remove the stains and streaks to prevent recurrence. Here are some effective methods:

Commercial Cleaning Products

The most effective way to remove dark streaks and stains is by using a product specifically designed for this purpose. Products like Wet and Forget or Spray and Forget are readily available in hardware stores. These products can be easily applied by attaching them to your home’s hose, spraying the affected area, and letting the solution sit.

Homemade Cleaning Solution

You can also create a cleaning solution by mixing one part oxygen bleach cleaner with one part water. This solution can be sprayed or poured over the affected area. Let it sit for 30 minutes before rinsing with a hose. Be extremely careful when using this method, as algae, mold, and mildew can make the roof very slippery.

Avoid Pressure Washing

Never use a pressure washer on your roof, as it can cause significant damage to the shingles, reducing the lifespan of your roof and potentially leading to costly repairs. The high-pressure water can strip away the protective granules on shingles, causing them to deteriorate faster and become less effective at protecting your home from the elements. 

Additionally, pressure washing can force water under the shingles, leading to leaks and water damage inside your home. Instead, opt for safer, recommended cleaning methods such as using a low-pressure garden hose and a gentle cleaning solution specifically designed for roofs. Regular, proper maintenance will help preserve your roof’s integrity and extend its lifespan, ensuring it continues to protect your home effectively.

Long-Term Prevention

Regular Maintenance

To prevent mold, mildew, and algae from returning, regular roof maintenance is essential. Ensure your roof is clean and free from debris, and address any moisture problems promptly.

Professional Inspections

Champion Restoration and Construction offers free roof inspections to identify and address any underlying issues causing moisture problems. Regular professional inspections can help maintain the health of your roof and prevent future issues.

Conclusion

Removing mold, mildew, and algae from your roof is essential for maintaining its appearance and longevity. While DIY methods can be effective, professional services ensure the job is done safely and thoroughly. For expert roof cleaning and maintenance, Champion Restoration and Construction in Chantilly, VA, is your trusted partner.

If you want to know more about Knowing When to Replace Your Gutters, click here.