Most homeowners see moss, lichen, or algae on their roof and think that it is time to give their shingles a good cleaning. While these blooms and growths can definitely signal the need for maintenance, they also reveal a lot about your roof and its habitat.
Nature’s Clues on Your Shingles
Moss thrives in damp, shaded areas. If you notice moss growing on one side of your roof—or under overhanging trees—it’s a sign that moisture is lingering longer than it should. That can be a sign that you’ve got poor sunlight exposure, clogged gutters, or even poor roof ventilation.
Algae, often appearing as dark streaks, can survive without a lot of moisture. They tend to bloom in humid regions and spread rapidly across shingles. While mostly cosmetic, algae can trap heat, degrading roofing materials over time.
Lichen is a flaky mix of algae and fungus, and it usually takes longer to appear. It’s stubborn and can actually grow into the surface of shingles, especially asphalt. This is why lichens can be among the most damaging “bloomers” if left untreated.
What It Means for Your Roof
A “blooming” roof isn’t necessarily doomed. However, it can tell you something about your roof’s needs. Consistent moss or lichen growth may mean:
Water is not draining or drying properly or quickly enough.
Ventilation in your attic is trapping moisture.
Your roof is too shaded by nearby trees.
Shingles are aging or losing protective granules.
A Balanced Response
Don’t panic, but make sure not to ignore these signs. A professional roof inspection can help determine whether you need cleaning, repairs, or just some preventative care. We offer these for free. If you spot moss or lichen, your roof might be blooming and need some professional help. Call us today.
