If you look up at your roof, do you notice black or green streaks on the asphalt shingles? Chances are, what you're looking at is mold. Not only is the mold unsightly, but it can also perpetuate roofing damage and premature roofing decay. It's in your best interest to remove it and then prevent it from coming back. Here's how.
Scrubbing away the mold with bleach.
Bleach is excellent at killing mold in the home, and it works on roofs too. Before you start applying bleach water to your roof, you'll want to lay down tarps or some plastic on the landscaping around the edge of your home. This way, any bleach water that drips off the edge of the roof won't kill your grass or plant life.
Fill a bucket with water, and add a couple of capfuls of bleach. Then, dip a long-handled mop or broom in this solution, and start applying it to your roof. Make sure you soak all of the moldy spots. If needed, you can have a friend hold the bucket for you as you stand on the ladder. Make more bleach solution as needed.
Give the bleach an hour or two to work and kill the mold. Then, hose the roof off with your garden hose or a pressure washer set on the lowest-pressure setting. The mold should wash away.
Eliminating shade and moisture.
Mold thrives in moist, shady areas. If your roof is shaded by trees, having the trees trimmed will increase the amount of sunlight that hits the roof, making it less hospitable to mold. Also, make sure you keep up with removing leaves and other debris from the roof. This debris can trap moisture against the roof, perpetuating mold growth. You can sweep most debris off with a long-handled broom.
Installing zinc strips.
If you can't just eliminate shade on your roof because the trees can't be removed or because a neighbor's building is casting the shade, there is another option. A roofing company can attach zinc strips to the roof near its peak. Whenever it rains, the zinc ions will be carried down the roof with the water. Since zinc is unappealing to mold, the zinc ions will keep your roof from growing more mold.
A moldy roof is more than just an eyesore. If left alone, the mold will cause your roof to break down prematurely. So, follow the tips above to get rid of the mold and keep it away!
If you feel these steps are too advanced for your ability, contact local roofing contractors, such as Silver Bow Construction, for help.
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