How To Reduce Algae Growth On Your Roof

If your roof receives a lot of shade and moisture, ugly algae can grow on the shingles, which then stains and ruins your roofing materials. Here are some tips for reducing the growth of algae on your roof.

Wash Away the Algae

Before you can work on preventing algae growth on your roof, you need to clean any current algae off. A good way to do this is by using water and bleach. Since you are working with bleach, it is a good idea to wear protective gear, including gloves, goggles, and a respirator mask. Get a large spray washer and fill it halfway with water, then fill the remainder of the spray washer with bleach. Put the cap on the spray washer and mix it well. Once mixed, you can spray the roof with the water and bleach mixture and use a scrub brush to scrub away the algae.

If you have plants near your house that are at risk of having bleach hit them during the cleaning and rinsing process, wet them with a garden hose first. This will protect them from the bleach solution that might hit them. As soon as you have washed the algae from your roof, make sure you rinse it very well with a hose. Do not use a pressure washer on your roof; it could damage the roofing materials.

Install Zinc Strips

Now that you have successfully removed the algae, you can start working to prevent more algae growth. Wait until your roof has dried completely after washing it, which could take a day or two depending on the current weather conditions. Get strips of zinc from your local home improvement store and install them on your roof. You want to install them underneath the row of shingles that is nearest to the peak of the roof. When it rains, the metal molecules from the zinc strips will drip down the roof, which helps to kill any algae that is growing.

Replace the Shingles

If there has been algae on your roof for a while, the shingles might already be ruined. In this case, you have no choice but to replace them. Even if the algae isn't causing damage to your roof, it can be unsightly. Luckily, the algae is probably only affecting some of your shingles, so it doesn't require a complete roof replacement. Call a professional roofing contractor like Allen Roofing & Construction Inc to replace the algae-ridden shingles, and make sure you install those zinc strips.


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