Skip to content
Charleston Roofing Jun 13, 2022 9:56:11 AM 4 min read

How to Remove Roof Stains: The Easy Solution

If you have a stain on your roof, you're probably wondering how to get it off. Don't worry - we have an easy solution for you! In this blog post, we will discuss the best ways to remove roof stains and get your home looking its best. So read on and learn how to remove those pesky stains in no time!

Roof Stains

You might not be able to see it, but that sheen that looks like mold on your roof is actually algae growth. Algae feed off of moisture and the limestone filler agents in shingles. The algae growth can quickly form and spread on your roof, leading to unsightly algae stains. If left untreated, algae can cause damage to your roofing materials and compromise your roof's integrity.

Plain water isn't effective in removing roof algae. Algicide is a safe and effective roof cleaning product that will kill roof algae and prevent them from coming back. Algicide is available in a variety of formulations, so be sure to read the label and choose the right product for your needs.

Before you start removing stains, be sure you check weather conditions and pick a calm day to work. Next, hire a roofing contractor to repair any loose or missing shingles. Then make sure your gutters are clean and free of debris. This will help keep water from pooling on your roof and allow it to drain properly. Finally, you can begin your roof cleaning process.

cleaning gutters before spray wash

Roof Cleaning Process


Tools you may need

  • Garden hose
  • Safety harness
  • Scrub brush
  • Cleaner solution

Prepare the surface

Before you start cleaning stains from your shingles, make sure the surface of the roof is dry. If it's wet, the cleaning solution will just rinse right off and you'll be wasting your time. Also, move any lawn furniture out of the way to prevent the cleaning products from damaging them.

Mix the cleaning solution

There are a variety of solutions available on the market, but most of them work in a similar way. Follow the instructions on the packaging to mix the solution.


If you're using a chemical cleaner, be sure to wear gloves and other protective gear. If you're using a natural cleaner, test it on a small area of the roof first to make sure it won't damage the shingles. Also, it is not recommended to use household bleach as this can discolor your roof.

Follow Instructions

After you've mixed the solution, apply it to the affected area with a brush or sprayer. a power washer is usually not recommended as it can damage shingles. Allow the solution to sit for the amount of time specified on the package. This will give it time to work on breaking down the stains.

Final Steps

Rinse off the cleaner with a garden hose and let the roof air dry. Once it's dry, check to see if the stains are gone. If they're not, you may need to repeat the process.

asphalt shingles growing moss

Trees or Branches

Algae isn't the only thing that can stain your roof. If you have trees nearby, you may also find leaves and branches on your roof. These can stain your roof and shorten its lifespan, so it's important to remove them as soon as possible. You can use a leaf blower or rake to remove leaves and branches from your roof. Just be careful not to damage the shingles while you're working.


You should also trim any trees or shrubs that are close to your house. This will prevent leaves and branches from falling on your roof and causing stains.


The best way to deal with roof stains is to prevent them from happening in the first place. You can do this by having your roof regularly inspected and cleaned by professional help. They will be able to identify any problem areas and address them before they become a bigger issue.

You should also make sure your gutters are clean and in good working order. Clogged gutters can cause water to pool on your roof, which leads to the growth of algae colonies.


Apply algicide to your roof in early spring to prevent new algae colonies from forming. Be sure to follow the instructions on the packaging.

There are a few other products on the market that can help homeowners prevent roof stains from forming in the first place. A stain-blocking solution will usually be applied as a coating to the roof, and work to seal the surface and protect it from spills and dirt. Roof stain prevention products can be found at most home improvement stores.

Cleaning your roof regularly is the best way to keep it looking its best. By following these tips, you can prevent stains from forming and keep your roof in good condition for years to come.

before and after spray wash

By following these simple steps, you can keep your roof looking its best for years to come! So don't wait - get started today and enjoy a clean, stain-free roof; If you have more questions on stain removal or need to hire a roofing contractor, please feel free to contact Charleston Roofing and Exteriors today, we are happy to help!