If your home has asphalt shingles, and you live in a humid region of the United States, your roof is susceptible to certain environmental issues – specifically moss and algae growth. Both organisms require moisture in order to thrive. Unfortunately, humidity provides plenty of that. Algae and moss can both pose serious threats to your roof. That's why it's important that you take steps to prevent the accumulation of both organisms. Here are some simple steps you can take to protect your asphalt shingles from algae and moss growth.
Keep the Trees Away
Trees provide your home with shelter from the wind, and protection from the hot sun. However, trees also provide the perfect environment for algae and mold to grow, especially if the branches are hanging over the roof. The shade provided by the branches, allows moisture to build up on the surface of your shingles, which then allows moss and algae to grow, and thrive on your roof. To prevent this from happening, you should keep your trees trimmed away from your roof. Trimming your trees will allow more sunlight to get to your roof, which will help prevent moss and algae growth.
It's also important to note that you should keep the leaves cleared off your roof. Leaves that accumulate on your roof can provide a breeding ground for moss and algae development. If see leaves on your roof, climb up on a ladder and use a leaf blower to clear the area. Be sure to keep your blower on the lowest setting, or you could cause your shingles to separate from the roof.
Maintain Your Gutters
You might not realize this, but dirty, or clogged rain gutters can also lead to moss and algae growth. If your gutters are dirty, or the downspouts are clogged, the water will seep under the shingles. If the water doesn't dry fast enough, moss and algae will begin to grow. If you have a multi-story home, and you have rain gutters on multiple levels of your roof, it's important that all the gutters be kept clean, and that the downspouts extend out past the roof. Failure to ensure this will cause water to drain from the gutters down onto the rest of your roof, which will increase your chances of moss and algae problems.
Clean the Roof
If you do notice a green tint to your asphalt shingles, it's time to get them clean. That green sheen means that you already have moss or algae growing on your shingles. Fill a garden sprayer with equal parts water and liquid bleach. Spray the green areas with the solution and allow it to soak in for about 15 minutes. Rinse the area with your garden hose and allow it to air dry. Repeat as necessary to keep your roof clean.
Don't let moss and algae get the best of your asphalt shingles. Use the information provided here to keep your roof looking it's best. Contact a roof repair expert for more help.