How to Get Rid of Algae on Your Roof: A Guide

Posted on: 11 September 2023


The presence of algae on your roof is not only visually unappealing but can also cause damage and reduce the longevity of your roof. Removing algae from your roof is a crucial step in maintaining its health and appearance. Here are some of the causes of algae growth and various ways to get rid of it.

Causes of Algae Growth

Algae can grow on any roof, but it is more common on roofs that are located in humid and shaded areas. The growth of algae is often due to an accumulation of moisture and minimal sunlight. Additionally, algae can spread from one part of the roof to another.

Methods to Remove Algae:

  • Pressure Washing: Using a pressure washer is a highly effective way to eliminate algae from your roof. However, it should be done by a professional, as excessive pressure can damage your roof. It is important to note that pressure washing can also dislodge granules on asphalt shingles, hence reducing the lifespan of your roof.
  • Chemical Treatments: Using chemical treatments is a popular option to remove algae from roofs. It involves applying an algae and moss-killing solution to the roof, which will kill the algae. The solution should be applied carefully and left for a few days before rinsing it off with water. It is important to use a biodegradable solution to avoid harming the environment.
  • Zinc or Copper Strips: Installing zinc or copper strips at the ridge of your roof can help prevent algae growth. When it rains, the water running down the roof carries zinc or copper ions, which will kill any growing algae.
  • Cleaning Solution: Create a cleaning solution by combining equal amounts of water and bleach. Apply the mixture using a gentle brush and let it sit for several minutes before rinsing thoroughly with water.

Regular cleaning and maintenance can effectively prevent algae growth on your roof. Ensure proper ventilation and sunlight, remove any debris or moss on your roof, keep your gutters clean, and repair or replace any damaged or missing shingles.

Algae growth on your roof can damage its appearance and decrease its lifespan if left untreated. Having knowledge about the dangers and methods of eliminating algae can aid in avoiding any possible damage to your roof. Choose the method that works best for you and keep your roof looking healthy and vibrant for years to come. Keeping your roof well-maintained not only adds value to your home but also prevents expensive repairs caused by potential roof issues. So, take care of your roof and leave those problems behind.

Contact a local roofing contractor to learn more.