Kill Roof Moss with Household Ingredients

roof moss on shingles

Summer is a great time to complete a number of roofing projects. And if you live in a climate where it’s often rainy and damp there is a strong possibility moss will grow on the roof. Moss is not necessarily harmful in itself, but it traps moisture against the roof, so it needs to be removed. We’ll outline how to remove moss with common household ingredients.

As mentioned above, moss isn’t harmful in and of itself but it retains a great amount of moisture that can decay asphalt shingles, wood tiles, and more.

It’s important to remove factors you can control to prevent mold growth, but once moss has grown removing it is a relatively simple procedure. With a wire scrub brush and a few household ingredients, you’ll be well on the way.

Grab the following tools and ingredients to get started:

  • Ladder

  • Wire scrub brush

  • Spray bottle

  • Chlorine Bleach

  • Baking soda

  • 5-gallon bucket

Bleach and baking soda have the potential to harm plants and grass beneath the roof, so exercise caution during their application. If you have sensitive skin consider wearing a long-sleeve shirt and gloves to protect yourself from the moss-killing solution.


Mix a solution and scrub away the moss

cleaning products

Wait until a clear summer day to remove roof moss. Begin by mixing a solution of 1/2 cup bleach to 4 gallons of warm water. (Scale this solution back if there is not a large amount of roof moss.)

Vinegar is often cited as another household cleaner adapt at removing moss. And while household vinegar contains acetic acid, its not in a strong enough concentration to entirely destroy moss. Household vinegar has a concentration of 5%, whereas commercial herbicides or bleach are around the 25% mark.

1. Carefully climb onto the roof with the solution and a stiff wire brush. Start from the ridge of the roof and work downwards, making sure the wire brush removes the moss. Leave the solution on the moss-covered areas for about 20 minutes.

2. With a hose or a bucket, thoroughly rinse off the washed areas with water.

3. To help prevent moss from growing back after it’s been removed fill a spray bottle with 1 quart of water with 3 tablespoons of baking soda.

4. Spray any area of the roof where moss has been removed. Apply a liberal amount to the spots where moss has grown. The baking soda will hinder the growth of more moss.

Check the weather forecast before removing any roof moss.

While it’s important to have a bright, clear day for the removal, a run of hot, dry days following the project will greatly benefit your efforts.

Keep in mind that removing moss is a dangerous DIY project.

Moss is slippery and working from the roof for extended periods of time exposes homeowners to the risk of injury or even death. If you feel at all uncomfortable about climbing on the roof hiring a professional to handle the project for you.

Hometown Roofing Contractors connects homeowners with skilled roofers. You can see what other people have to say about their experiences and request quotes from multiple professionals. Don’t let short-term problems turn into expensive projects. Connect with an experienced contractor today.

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