Bealing Roofing & Exteriors in Hanover, PA

What to Do About Stains on Roof Shingles in Hanover, PA? in Hanover, PA

Are roof stains detracting from the overall beauty of your home? Wondering what is causing those dark streaks on your shingles? The culprit is typically algae, a common issue in the Eastern United States. However, there are other causes of roof stains to consider, including rust stains from chimneys and vegetation stains from nearby trees. Let’s take a detailed look at what you should do about stains on your roof shingles.

Addressing Stains on Your Roof Shingles

Algae Stains

The most common type of stain on roof shingles is caused by algae. To tackle algae stains, you need oxygen bleach. Mix the bleach with an equal part of water and carefully spray wash the roof. It is essential not to use a pressure washer for this task. The high pressure from a hose can damage the shingles, potentially causing more harm than good. If this method does not yield the desired results, consider calling a professional. 

Experts often use stronger cleaners, such as a trisodium phosphate solution. Be aware that trisodium phosphate is toxic and requires special protective gear during application.

Rust Stains

Rust stains frequently appear around older metal chimneys. As these chimneys age, they can leave rust streaks down your roof. Installing newer, stainless steel chimneys can help prevent this issue. 

To clean existing rust stains, use oxalic acid. This not only removes the stains but also helps to prevent future rust from developing on your shingles.

Vegetation Stains

If you live near trees, vegetation stains can be a common problem. Seeds, berries, leaves, and other debris that fall from trees can stain your roof. These stains can usually be cleaned using the same method recommended for algae stains—a solution of oxygen bleach and water should do the trick.

How to Prevent Stains on Your Roof Shingles

The primary offender for stains in this region is algae. One effective way to prevent algae from forming is by inserting strips of zinc or copper under the shingles closest to the roof peak. Leave about 1 to 2 inches of these strips exposed. When it rains, the water washes metallic atoms off these strips onto the roof below. These metallic atoms possess a unique attribute; they effectively kill algae trying to form on your shingles.

Algae tend to thrive in damp, shaded areas. To combat this, trim back nearby trees to ensure your roof receives the maximum amount of sunlight. This will help keep the roof dry and inhibit algae growth. Essentially, with some dedicated effort and preventative measures, you can keep future stains at bay.

Regular Maintenance

Performing regular maintenance on your roof can significantly help in preventing stains. Ensure that gutters are clean and free-flowing to prevent water build-up. Check for and repair any leaks that could provide a breeding ground for algae. Regular inspections can help you catch issues before they develop into larger problems.

Professional Roof Inspections

While DIY methods can be highly effective, there are times when professional help is warranted. Regular professional roof inspections can catch potential problems early. Our experts at Bealing Roofing & Exteriors can provide invaluable advice and solutions for maintaining the health and appearance of your roof.

Schedule a Free Roof Inspection

If you have questions about tougher stains or need professional help, reach out to a local roofing company you can trust. Bealing Roofing & Exteriors has the experience and expertise not only to install high-quality shingle roofs but also to ensure they remain beautiful for years to come.

Don’t let stains detract from the beauty of your property. Give us a call today at for a free roof inspection!

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