Dark Streaks on Your Roof? Call the #1 Roofing Company in Mount VernonHave you ever looked up at your roof and noticed dark streaks running along the shingles? Those dark streaks could be algae growth, which can cause discoloration of roof shingles, making them turn black or brown.

At Robison, we are a trusted roofing company in Mount Vernon, and we know how difficult it can be to recognize algae growth; many people mistake it for dirt, soot, or debris that has fallen from trees. The algae growth can happen anywhere in the United States. Here are some of the most common questions we get about algae growth as do many roofing companies in Mount Vernon.


Roofing Company in Mount Vernon — Can Algae Discoloration Be Removed from My Asphalt Roof?

A roofing company in Mount Vernon, cannot completely remove algae stains from your roof, however they can lighten the discoloration with a mixture of diluted bleach and water.


Roofing Company in Mount Vernon — What Are the Best Ways to Lighten Algae Discoloration?

According to a roofing company in Mount Vernon, the best way to lighten your roof’s algae discoloration is:


  • Spray with a diluted solution of bleach and water
  • DO NOT use a pressure washer
  • 10-20 minutes after spraying your roof with the solution, rinse with plain water
  • Repeat as many times as necessary


Roofing Company in Mount Vernon — Does Algae Growth Hurt My Roof’s Shingles?

There is no definite evidence that algae growth can harm your roof’s shingles; it’s just an unappealing look for your home. However, many roofing professionals believe that algae growth can lead to mold growth and wood rot if left untreated for too long.

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Roofing Company in Mount Vernon — Can I Purchase Algae Resistant Shingles?

You can purchase asphalt shingles with algae-resistant minerals. These types of shingles have metals, such as copper that reduces algae growth. In recent years, roofers have realized that metals like copper can prevent algae from growing on roofs.


Roofing Company in Mount Vernon — In What Ways Can Algae Effect Your Roof?

Although there is no definite proof, roofing companies in Mount Vernon believe that letting algae grow for too long can harm your roof. The most common ways algae can affect your roof are:


  • Appearance 
  • Home value
  • Aesthetic value
  • Wood rot
  • Mold
  • Lifespan


Roofing Company in Mount Vernon — How do You Know If You Need a Roof Repair, Cleaning, or Replacement?

When you call a roofing company in Mount Vernon about your algae problem, they can tell you whether your shingles are damaged to the point of needing replaced. Someone who isn’t a trained professional may not notice wood rot or shingle issues, which is why it is best to hire a roofing professional. A professional can advise you on whether or not you need a simple cleaning, shingle replacement, or repairs.


At Robison,

We Stand Behind Our Word and Our Work!

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At Robison, we are your trusted source for commercial roof repair in Mount Vernon. We provide fast and professional service for every kind of roof. Our team of professionals is here to service your roof from start to finish, we even provide residential roof repair in Mount Vernon. We are also a metal building contractor in Mount Vernon.

For a free estimate on your next project, fill out an online form here or call us at 319-363-0110.

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Robison is committed to providing you with the best options for your roof system and design. We approach every roofing project with a focus on functionality, cost, and aesthetics. Each project is handled with unique perspective and integrity. Ingenuity and an eye for solutions make Robison the obvious choice for residential, agricultural, commercial, and industrial roofing systems.